Update main.yml

Author: dbuos

.github/workflows/main.yml

@@ -32,7 +32,7 @@ jobs:
         run: bash <(curl -s https://codecov.io/bash)
 
   release:
-    if: github.event_name != 'release'
+    if: github.event_name == 'release'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2