uncomment build condition check

Author: YouNeedCryDear

.github/workflows/_release.yml

@@ -25,7 +25,7 @@ env:
 
 jobs:
   build:
-    # if: github.ref == 'refs/heads/main'
+    if: github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
 
     outputs: