ci: add if-no-files-found: ignore to actions/upload-artifact (#672)

Author: hi-ogawa

.github/workflows/ci-rsc.yml

@@ -83,3 +83,4 @@ jobs:
           name: test-results-${{ matrix.os }}-${{ matrix.browser }}${{ matrix.rolldown == true && '-rolldown' || '' }}${{ matrix.react_version && format('-react-{0}', matrix.react_version) || '' }}
           path: |
             packages/plugin-rsc/test-results
+          if-no-files-found: ignore