GitHub CI Build: Use Maven 3.9.9.

Author: wilx

.github/workflows/maven.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Set up Maven
       uses: stCarolas/setup-maven@d6af6abeda15e98926a57b5aa970a96bb37f97d1 # v5
       with:
-        maven-version: 3.9.7
+        maven-version: 3.9.9
     - name: Felix SCR
       run: mvn -B -V -Dstyle.color=always --file scr/pom.xml clean verify
     - name: Felix Log