chore(deps): update codecov/codecov-action action to v5

Author: renovate[bot]

.github/workflows/rav1e.yml

@@ -350,7 +350,7 @@ jobs:
           sccache --stop-server
       - name: Codecov upload
         if: matrix.conf == 'grcov-codecov'
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           files: lcov.info