Bump eclipse-aether.version from 1.9.18 to 1.9.20

Bumps `eclipse-aether.version` from 1.9.18 to 1.9.20.

Updates `org.apache.maven.resolver:maven-resolver-api` from 1.9.18 to 1.9.20
- [Release notes](https://github.com/apache/maven-resolver/releases)
- [Commits](apache/maven-resolver@maven-resolver-1.9.18...maven-resolver-1.9.20)

Updates `org.apache.maven.resolver:maven-resolver-impl` from 1.9.18 to 1.9.20
- [Release notes](https://github.com/apache/maven-resolver/releases)
- [Commits](apache/maven-resolver@maven-resolver-1.9.18...maven-resolver-1.9.20)

Updates `org.apache.maven.resolver:maven-resolver-util` from 1.9.18 to 1.9.20
- [Release notes](https://github.com/apache/maven-resolver/releases)
- [Commits](apache/maven-resolver@maven-resolver-1.9.18...maven-resolver-1.9.20)

---
updated-dependencies:
- dependency-name: org.apache.maven.resolver:maven-resolver-api
  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-util
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -36,7 +36,7 @@
 
   <properties>
     <apache-maven.version>3.9.6</apache-maven.version>
-    <eclipse-aether.version>1.9.18</eclipse-aether.version>
+    <eclipse-aether.version>1.9.20</eclipse-aether.version>
     <plugin-testing.version>3.0.2</plugin-testing.version>
 
     <maven.build.timestamp.format>yyyyMMdd-HHmm</maven.build.timestamp.format>