fix the syntax

.github/workflows/webhook.yml

@@ -3,14 +3,14 @@ name: "Webhook Event example"
 on:
   repository_dispatch:
     types:
-      - custom_webhook
+      - 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"