Bump quarkus.version from 3.19.4 to 3.21.0

Bumps `quarkus.version` from 3.19.4 to 3.21.0.

Updates `io.quarkus.platform:quarkus-bom` from 3.19.4 to 3.21.0
- [Commits](quarkusio/quarkus-platform@3.19.4...3.21.0)

Updates `io.quarkus.platform:quarkus-maven-plugin` from 3.19.4 to 3.21.0
- [Commits](quarkusio/quarkus-platform@3.19.4...3.21.0)

---
updated-dependencies:
- dependency-name: io.quarkus.platform:quarkus-bom
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.quarkus.platform:quarkus-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

querydsl-examples/querydsl-example-jpa-quarkus/pom.xml

@@ -12,7 +12,7 @@
   <name>Querydsl example - JPA Quarkus</name>
 
   <properties>
-    <quarkus.version>3.19.4</quarkus.version>
+    <quarkus.version>3.21.0</quarkus.version>
   </properties>
 
   <dependencyManagement>