Give release step write permissions on contents

Author: sbesson

.github/workflows/maven.yml

@@ -29,6 +29,8 @@ jobs:
       - name: Build
         run: mvn ${{ env.maven_commands }}
   release:
+    permissions:
+      contents: write
     needs: build
     if: startsWith(github.ref, 'refs/tags')
     runs-on: ubuntu-latest