Use UTF-8 constant in QuarkusEntryPoint

[geoand]

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[quarkus-bot]

Failing Jobs - Building 2248e39

Status	Name	Step	Failures	Logs	Raw logs	Build scan
✖	JVM Tests - JDK 17	Build	Failures	Logs	Raw logs	🔍
✔️	JVM Tests - JDK 21					🔍

Full information is available in the Build summary check run.
You can also consult the Develocity build scans.

Failures

⚙️ JVM Tests - JDK 17 #

- Failing: integration-tests/smallrye-context-propagation 

📦 integration-tests/smallrye-context-propagation

✖ io.quarkus.context.test.mutiny.MutinyContextPropagationTest.testTransactionContextPropagationAsyncUni line 144 - More details - Source on GitHub

java.lang.AssertionError: 
1 expectation failed.
Expected status code <200> but was <500>.

✖ io.quarkus.context.test.mutiny.MutinyContextPropagationTest.testTransactionContextPropagationMulti line 153 - More details - Source on GitHub

java.lang.AssertionError: 
1 expectation failed.
Expected status code <200> but was <500>.

✖ io.quarkus.context.test.mutiny.MutinyContextPropagationTest.testTransactionNewContextPropagationSync line 138 - More details - Source on GitHub

java.lang.AssertionError: 
1 expectation failed.
Expected status code <200> but was <500>.