ci: bump codecov/codecov-action from 4.3.1 to 5.1.2

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4.3.1 to 5.1.2.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4.3.1...v5.1.2)

---
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/ci-test.yaml

@@ -101,7 +101,7 @@ jobs:
         run: go test -race -coverprofile=coverage.txt -covermode=atomic -v ./...
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v4.3.1
+        uses: codecov/codecov-action@v5.1.2
         with:
           directory: client-sdk/go