build: add back the 'if release created check'

I thought if an 'if' fails - the job doesn't continue on going

.github/workflows/main.yml

@@ -49,6 +49,7 @@ jobs:
         with:
           name: libs
       - name: upload release artifacts
+        if: ${{ steps.release.outputs.release_created }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |