fix release workflow

Author: jpmsam

.github/workflows/release.yml

@@ -1,8 +1,8 @@
 name: Release
 on:
   push:
-   tags:
-     - 'v*'
+    tags:
+      - 'v*'
 env:
   GO_VERSION: 1.13
   GOPATH: ${{ github.workspace }}/go
@@ -339,4 +339,4 @@ jobs:
           _post() {
             curl -X POST ${{ secrets.SLACK_WEBHOOK_URL }} -H "Content-type: application/json" --data "@${1}"
           }
-          _post "long_message.json" || _post "short_message.json"
+          _post "long_message.json" || _post "short_message.json"