fix this syntax

Author: MickeyGithubL

.github/workflows/webhook.yml

@@ -5,12 +5,12 @@ on:
     types:
       - custom webhook
 
-      
+
 jobs:
   respond-to-dispatch:
     runs-on: ubuntu-latest
     steps:
-      - name Checkout repo
+      - name: Checkout repo
         uses: actions/checkout@v2
       - name: Run a script
         run: echo "Event of type: $GITHUB_EVENT_NAME"