change maven version and add permissions in action

.gitea/workflows/maven.yaml

@@ -7,18 +7,20 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - name: Checkout the repo
         uses: actions/checkout@v4
       - name: Set up Maven
         uses: stCarolas/setup-maven@v5
         with:
-          maven-version: '3.8.2'
+          maven-version: '3.9.9'
       - name: Set up JDK 23
         uses: actions/setup-java@v4
         with:
           java-version: 23
           distribution: 'temurin'
-          cache: maven
+          cache: 'maven'
       - name: Build with Maven
         run: mvn -B package --file pom.xml