Bump Gradle version to 8.4

[glefloch]

This update Gradle to version 8.4

[Sanne]

Awesome, thanks!

[quarkus-bot]

Failing Jobs - Building 636c06a

Status	Name	Step	Failures	Logs	Raw logs	Build scan
✔️	Maven Tests - JDK 11
✖	Maven Tests - JDK 11 Windows	Build	Failures	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ Maven Tests - JDK 11 Windows #

- Failing: integration-tests/maven 

📦 integration-tests/maven

✖ io.quarkus.maven.it.DevMojoIT.testExternalReloadableArtifacts line 1448 - More details - Source on GitHub

org.awaitility.core.ConditionTimeoutException: Condition with lambda expression in io.quarkus.maven.it.DevMojoIT was not fulfilled within 1 minutes.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at org.awaitility.core.CallableCondition.await(CallableCondition.java:78)

✖ io.quarkus.maven.it.JarRunnerIT.testNonAsciiDir line 70 - More details - Source on GitHub

java.lang.AssertionError: 

Expecting actual:

✖ io.quarkus.maven.it.DevMojoIT.testExternalReloadableArtifacts line 1448 - More details - Source on GitHub

org.awaitility.core.ConditionTimeoutException: Condition with lambda expression in io.quarkus.maven.it.DevMojoIT was not fulfilled within 1 minutes.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at org.awaitility.core.CallableCondition.await(CallableCondition.java:78)

✖ io.quarkus.maven.it.JarRunnerIT.testNonAsciiDir line 70 - More details - Source on GitHub

java.lang.AssertionError: 

Expecting actual: