Bump org-apache-maven-resolver from 1.9.20 to 1.9.21

Bumps `org-apache-maven-resolver` from 1.9.20 to 1.9.21.

Updates `org.apache.maven.resolver:maven-resolver-connector-basic` from 1.9.20 to 1.9.21
- [Release notes](https://github.com/apache/maven-resolver/releases)
- [Commits](https://github.com/apache/maven-resolver/compare/maven-resolver-1.9.20...maven-resolver-1.9.21)

Updates `org.apache.maven.resolver:maven-resolver-impl` from 1.9.20 to 1.9.21
- [Release notes](https://github.com/apache/maven-resolver/releases)
- [Commits](https://github.com/apache/maven-resolver/compare/maven-resolver-1.9.20...maven-resolver-1.9.21)

Updates `org.apache.maven.resolver:maven-resolver-transport-http` from 1.9.20 to 1.9.21

---
updated-dependencies:
- dependency-name: org.apache.maven.resolver:maven-resolver-connector-basic
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.maven.resolver:maven-resolver-impl
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.maven.resolver:maven-resolver-transport-http
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ io-spring-javaformat = "0.0.42"
 io-spring-nohttp = "0.0.11"
 jakarta-websocket = "2.1.1"
 org-apache-directory-server = "1.5.5"
-org-apache-maven-resolver = "1.9.20"
+org-apache-maven-resolver = "1.9.21"
 org-aspectj = "1.9.22.1"
 org-bouncycastle = "1.70"
 org-eclipse-jetty = "11.0.22"