ci: fix dist path error

Author: SWHL

.github/workflows/gen_whl_to_pypi_rapidocr_api.yml

@@ -30,4 +30,4 @@ jobs:
         uses: pypa/gh-action-pypi-publish@v1.5.0
         with:
           password: ${{ secrets.RAPIDOCR_API_PYPI }}
-          packages_dir: api/dist/
+          packages_dir: dist/