chore: update GitHub Actions and Test Configurations

- Update the `codecov-action` version from `v3` to `v4` in GitHub workflow for Go.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

.github/workflows/go.yml

@@ -63,6 +63,6 @@ jobs:
           go test -v -covermode=atomic -coverprofile=coverage.out
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           flags: ${{ matrix.os }},go-${{ matrix.go }}