Use Maven setup in CI.

Author: uhafner

.github/workflows/ci.yml

@@ -27,6 +27,10 @@ jobs:
           java-version: '${{ matrix.jdk }}'
           check-latest: true
           cache: 'maven'
+      - name: Set up Maven
+        uses: stCarolas/setup-maven@v4
+        with:
+          maven-version: 3.9.5
       - name: Build with Maven
         env:
           BROWSER: chrome-container