ci(release): bump emqx/upload-assets to 0.5.2

this version adds an option to skip uploading existing assets

.github/workflows/release.yaml

@@ -67,12 +67,13 @@ jobs:
           BUCKET=${{ secrets.AWS_S3_BUCKET }}
           OUTPUT_DIR=${{ steps.profile.outputs.s3dir }}
           aws s3 cp --recursive s3://$BUCKET/$OUTPUT_DIR/${{ env.ref_name }} packages
-      - uses: emqx/upload-assets@8d2083b4dbe3151b0b735572eaa153b6acb647fe # 0.5.0
+      - uses: emqx/upload-assets@974befcf0e72a1811360a81c798855efb66b0551 # 0.5.2
         env:
           GITHUB_TOKEN: ${{ github.token }}
         with:
           asset_paths: '["packages/*"]'
           tag_name: "${{ env.ref_name }}"
+          skip_existing: true
       - name: update to emqx.io
         if: startsWith(env.ref_name, 'v') && ((github.event_name == 'release' && !github.event.release.prerelease) || inputs.publish_release_artefacts)
         run: |