Add link to Mutiny guide

[phillip-kruger]

This will add a link in the Dev UI to the Mutiny Guide

[quarkus-bot]

Failing Jobs - Building 24f908b

Status	Name	Step	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 11
✖	JVM Tests - JDK 11 Windows	Build	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 17
✔️	JVM Tests - JDK 18

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 11 Windows #

- Failing: integration-tests/opentelemetry-reactive 

📦 integration-tests/opentelemetry-reactive

✖ io.quarkus.it.opentelemetry.reactive.OpenTelemetryReactiveClientTest.post line 94 - More details - Source on GitHub

org.opentest4j.AssertionFailedError: expected: <e0b028d26c3200af> but was: <09c8037d83f6effa>
	at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
	at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)