build(deps): bump codecov/codecov-action from 3 to 4

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 4.
- [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...v4)

---
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.yml

@@ -24,7 +24,7 @@ jobs:
       - name: test & coverage report creation
         run: |
           CGO_ENABLED=1 go test ./... -mod=readonly -timeout 8m -race -coverprofile=coverage.txt -covermode=atomic -tags=memdb,goleveldb,cleveldb,boltdb,rocksdb,badgerdb -v
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           file: ./coverage.txt
           fail_ci_if_error: true