Switch to maven 3.9.8

Next release will require maven 3.9.5+. Let's build this project
with latest 3.9.8.

JIRA: LIGHTY-327
Signed-off-by: Ivan Hrasko <ivan.hrasko@pantheon.tech>

Author: ihrasko

.github/workflows/build.yml

@@ -25,6 +25,10 @@ jobs:
         with:
           java-version: 21
           distribution: 'temurin'
+      - name: Set up Maven
+        uses: stCarolas/setup-maven@v5
+        with:
+          maven-version: 3.9.8
       - name: Cache SonarCloud packages
         uses: actions/cache@v1
         if: ${{ env.SONAR_TOKEN != 0 }}