Use maven version 3.9.9

Set up workflows to download Maven 3.9.9 as ubuntu-latest
provide 3.8.8 by default.

Signed-off-by: Samuel Schneider <[email protected]>

Author: SamoSchneider

.github/workflows/maven.yml

@@ -27,5 +27,9 @@ jobs:
         java-version: '21'
         distribution: 'temurin'
         cache: maven
+    - name: Set up Maven
+      uses: stCarolas/setup-maven@v5
+      with:
+        maven-version: 3.9.9
     - name: Build with Maven
       run: mvn -B install --file pom.xml