Bump Gradle Wrappers (#499)

# Combined PRs ➡️📦⬅️

✅ The following pull requests have been successfully combined on this
PR:
- Closes #498 Bump Gradle Wrapper from 8.11.1 to 8.12 in
/.github/workflow-samples/kotlin-dsl
- Closes #497 Bump Gradle Wrapper from 8.11.1 to 8.12 in
/.github/workflow-samples/java-toolchain
- Closes #496 Bump Gradle Wrapper from 8.11.1 to 8.12 in
/.github/workflow-samples/groovy-dsl
- Closes #495 Bump Gradle Wrapper from 8.11.1 to 8.12 in
/.github/workflow-samples/gradle-plugin
- Closes #494 Bump Gradle Wrapper from 8.11.1 to 8.12 in
/sources/test/init-scripts

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.github/workflow-samples/groovy-dsl/gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=f397b287023acdba1e9f6fc5ea72d22dd63669d59ed4a289a29b1a76eee151c6
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionSha256Sum=7a00d51fb93147819aab76024feece20b6b84e420694101f276be952e08bef03
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME