Update Codecov action to version 5.

Author: craigthomas

.github/workflows/gradle.yml

@@ -16,6 +16,6 @@ jobs:
     - name: Build with Gradle
       run: ./gradlew build
     - name: Codecov
-      uses: codecov/codecov-action@v4.2.0
+      uses: codecov/codecov-action@v5
       env:
         CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}