Use Codecov token (#164)

Author: simonmarty

.github/workflows/maven.yml

@@ -27,4 +27,6 @@ jobs:
     - name: Build with Maven
       run: mvn clean package
     - name: Codecov
-      uses: codecov/codecov-action@v5.4.0
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}