Bump org.eclipse.jetty:jetty-bom from 11.0.20 to 11.0.21

Bumps [org.eclipse.jetty:jetty-bom](https://github.com/jetty/jetty.project) from 11.0.20 to 11.0.21.
- [Release notes](https://github.com/jetty/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-11.0.20...jetty-11.0.21)

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -31,7 +31,7 @@
         <version.quarkus>3.10.1</version.quarkus>
         <version.testng>7.10.2</version.testng>
         <version.arquillian.jetty>2.0.0.Final</version.arquillian.jetty>
-        <version.jetty>11.0.20</version.jetty>
+        <version.jetty>11.0.21</version.jetty>
 
         <!-- Use Jakarta EE 10 versions -->
         <version.resteasy>6.2.3.Final</version.resteasy>