Fix Java compiler version: change from 25 to 21 for all Java 21 projects

Fixed maven.compiler.release in the following projects:
- chapter2/quarkus-rest-services
- chapter3/quarkus-aws-lambda-http
- chapter3/quarkus-google-cloud-functions-cloud-events
- chapter3/quarkus-google-cloud-functions-http
- chapter4/knative-quarkus-function-ce
- chapter4/knative-quarkus-function-http
- chapter4/quarkus-funqy-aws
- chapter4/quarkus-funqy-gcp-cloud-events
- chapter4/quarkus-funqy-gcp-http
- chapter4/quarkus-funqy-standalone
- chapter5/containerized-quarkus-app

Java 25 does not exist. Changed to Java 21 to match build matrix.
Fixes: release version 25 not supported error

Author: danieloh30

.quarkus/cli/plugins/quarkus-cli-catalog.json

@@ -0,0 +1,13 @@
+{
+  "version" : "v1",
+  "lastUpdate" : "08/05/2025 07:52:36",
+  "plugins" : {
+    "tls" : {
+      "name" : "tls",
+      "type" : "extension",
+      "location" : "io.quarkus:quarkus-tls-registry-cli:3.22.2",
+      "description" : null,
+      "inProjectCatalog" : false
+    }
+  }
+}

chapter2/quarkus-rest-services/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>

chapter3/quarkus-aws-lambda-http/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>

chapter3/quarkus-google-cloud-functions-cloud-events/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.12.1</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>

chapter3/quarkus-google-cloud-functions-http/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>

chapter4/knative-quarkus-function-ce/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>

chapter4/knative-quarkus-function-http/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>

chapter4/quarkus-funqy-aws/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>

chapter4/quarkus-funqy-gcp-cloud-events/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>

chapter4/quarkus-funqy-gcp-http/pom.xml

@@ -7,7 +7,7 @@
   <version>1.0.0-SNAPSHOT</version>
   <properties>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <maven.compiler.release>25</maven.compiler.release>
+    <maven.compiler.release>21</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.platform.artifact-id>quarkus-bom</quarkus.platform.artifact-id>