Update codecov/codecov-action action to v6 (#520)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/maven.yml

@@ -31,6 +31,6 @@ jobs:
         run: mvn -Penable-jacoco clean verify -B -V -ntp
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           file: '*jacoco.xml'