changed tf plan to self runner on gcp

Author: linoy-zoaretz

.github/workflows/terraform-plan.yml

@@ -1,19 +1,17 @@
-name: 'Terraform'
+name: 'Terraform Plan'
 
 on:
-  workflow_dispatch: # manual action run
+  pull_request:
+    branches:
+      - main
 
 permissions:
   contents: read
 
 jobs:
   terraform:
     name: 'Terraform Plan'
-    runs-on: ubuntu-latest
-    environment: development
-    defaults:
-      run:
-        shell: bash
+    runs-on: self-hosted
 
     steps:
     # Checkout the repository to the GitHub Actions runner