Bump codecov/codecov-action from 4 to 5 in /swift/test/xcode

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]>

swift/test/xcode/action.yml

@@ -93,7 +93,7 @@ runs:
           ./.build
           ./.derived-data
           $HOME/Library/Developer/Xcode/DerivedData
-    - uses: codecov/codecov-action@v4
+    - uses: codecov/codecov-action@v5
       if: ${{ inputs.skip-codecov != 'true' }}
       with:
         token: ${{ inputs.codecov-token }}