Bump codecov/codecov-action from 4.pre.beta to 4.0.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4.pre.beta to 4.0.0.
- [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-beta...v4.0.0)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/blank.yml

@@ -44,7 +44,7 @@ jobs:
             ${{ runner.os }}-
       - uses: julia-actions/julia-buildpkg@latest
       - uses: julia-actions/julia-runtest@latest
-      - uses: codecov/codecov-action@v4-beta
+      - uses: codecov/codecov-action@v4.0.0
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_ORG_TOKEN }}
   build_docs: