fix: add a stat condition check for uploading release binaries

This commits adds a check to confirm the existance of files in the release
subdirectories before attempting to upload to GitHub release.
This change helps avoid unnecessary errors in the case where the release
subdirectories are empty

Signed-off-by: jiaxiao zhou <jiazho@microsoft.com>

.github/workflows/release.yml

@@ -99,9 +99,15 @@ jobs:
       - name: Create release
         run: |
           gh release create ${{ github.ref }} --generate-notes --prerelease
-          for i in release/*/*; do
-            gh release upload ${RELEASE_NAME} $i
-          done
+          # skip upload if there are no files
+          if stat release/*/* >/dev/null 2>&1; then
+            for i in release/*/*; do
+              gh release upload ${RELEASE_NAME} $i
+            done
+          else
+            echo "No files to upload"
+            exit 0
+          fi
         env:
           GH_TOKEN: ${{ github.token }}
           RELEASE_NAME: ${{ needs.generate.outputs.crate }}/${{ needs.generate.outputs.version }}