Bump codecov/codecov-action from 3 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 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@v3...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]>

Author: dependabot[bot]

.github/workflows/gap.yml

@@ -33,4 +33,4 @@ jobs:
         with:
           GAP_TESTFILE: "tst/testall.g"
       - uses: gap-actions/process-coverage@v2
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v5