Bump com.gradle:quarkus-build-caching-extension from 1.5 to 1.6

Bumps [com.gradle:quarkus-build-caching-extension](https://github.com/gradle/develocity-build-config-samples) from 1.5 to 1.6.
- [Release notes](https://github.com/gradle/develocity-build-config-samples/releases)
- [Commits](gradle/develocity-build-config-samples@v1.5...v1.6)

---
updated-dependencies:
- dependency-name: com.gradle:quarkus-build-caching-extension
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
(cherry picked from commit b8bc206)

.mvn/extensions.xml

@@ -12,7 +12,7 @@
     <extension>
         <groupId>com.gradle</groupId>
         <artifactId>quarkus-build-caching-extension</artifactId>
-        <version>1.5</version>
+        <version>1.6</version>
     </extension>
     <extension>
         <groupId>io.quarkus.develocity</groupId>