Bump codecov/codecov-action from 4 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4 to 5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4...v5)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/php-test-plugins.yml

@@ -87,7 +87,7 @@ jobs:
           fi
       - name: Upload single site coverage reports to Codecov
         if: ${{ matrix.coverage == true }}
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: coverage-${{ github.sha }}.xml
@@ -96,7 +96,7 @@ jobs:
           fail_ci_if_error: true
       - name: Upload multisite coverage reports to Codecov
         if: ${{ matrix.coverage == true }}
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: coverage-multisite-${{ github.sha }}.xml