Build(deps-dev): Bump org.apache.maven.plugins:maven-surefire-plugin (#278)

Bumps [org.apache.maven.plugins:maven-surefire-plugin](https://github.com/apache/maven-surefire) from 3.5.5 to 3.5.6.
- [Release notes](https://github.com/apache/maven-surefire/releases)
- [Commits](apache/maven-surefire@surefire-3.5.5...surefire-3.5.6)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-surefire-plugin
  dependency-version: 3.5.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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chapter4/knative-springboot/pom.xml

@@ -16,7 +16,7 @@
     <java.version>21</java.version>
     <spring-cloud.version>2025.1.1</spring-cloud.version>
     <compiler-plugin.version>3.13.0</compiler-plugin.version>
-    <surefire-plugin.version>3.5.5</surefire-plugin.version>
+    <surefire-plugin.version>3.5.6</surefire-plugin.version>
     <maven.compiler.parameters>true</maven.compiler.parameters>
     <maven.compiler.source>21</maven.compiler.source>
     <maven.compiler.target>21</maven.compiler.target>