Bump org.apache.maven.plugins:maven-compiler-plugin in /backend (#39)

Bumps [org.apache.maven.plugins:maven-compiler-plugin](https://github.com/apache/maven-compiler-plugin) from 3.12.1 to 3.13.0.
- [Release notes](https://github.com/apache/maven-compiler-plugin/releases)
- [Commits](apache/maven-compiler-plugin@maven-compiler-plugin-3.12.1...maven-compiler-plugin-3.13.0)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-compiler-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/pom.xml

@@ -15,7 +15,7 @@
     <quarkus.platform.group-id>io.quarkus.platform</quarkus.platform.group-id>
     <quarkus.platform.version>3.8.3</quarkus.platform.version>
 
-    <compiler-plugin.version>3.12.1</compiler-plugin.version>
+    <compiler-plugin.version>3.13.0</compiler-plugin.version>
     <surefire-plugin.version>3.2.5</surefire-plugin.version>
   </properties>
   <dependencyManagement>