Replace set-output with recommended env output

.github/workflows/release.yml

@@ -52,7 +52,7 @@ jobs:
         digest=$(find ${{ env.PRODUCT }}* -type f -exec sha256sum {} +)
         digest="${digest//$'%'/%25}"
         digest="${digest//$'\n'/%0A}"
-        echo "::set-output name=result::$digest"
+        echo "result=${digest}" >> $GITHUB_OUTPUT
 
   release:
     name: Create and upload release