Address review feedback: set inceptionYear to 2026 for new example projects

@chernser noted the newly-created example projects should carry inceptionYear
2026 (they were created recently), not 2025. Applied to all three converted
example poms for consistency (client-v2-apache-arrow, demo-kotlin-service,
demo-service). Pre-existing example poms (client-v2, client, jdbc) are left
untouched — each reflects its own creation year.

Author: polyglotAI-bot

examples/client-v2-apache-arrow/pom.xml

@@ -12,7 +12,7 @@
     <name>Client V2 Apache Arrow Examples</name>
     <description>Client V2 Apache Arrow Examples</description>
     <url>https://github.com/ClickHouse/clickhouse-java</url>
-    <inceptionYear>2025</inceptionYear>
+    <inceptionYear>2026</inceptionYear>
 
     <organization>
         <name>ClickHouse, Inc.</name>

examples/demo-kotlin-service/pom.xml

@@ -12,7 +12,7 @@
     <name>ClickHouse Java Kotlin Demo Service</name>
     <description>Ktor service using the ClickHouse client-v2</description>
     <url>https://github.com/ClickHouse/clickhouse-java</url>
-    <inceptionYear>2025</inceptionYear>
+    <inceptionYear>2026</inceptionYear>
 
     <organization>
         <name>ClickHouse, Inc.</name>

examples/demo-service/pom.xml

@@ -19,7 +19,7 @@
     <name>ClickHouse Java Demo Service</name>
     <description>Spring Boot service using the ClickHouse client directly and via JPA</description>
     <url>https://github.com/ClickHouse/clickhouse-java</url>
-    <inceptionYear>2025</inceptionYear>
+    <inceptionYear>2026</inceptionYear>
 
     <organization>
         <name>ClickHouse, Inc.</name>