[goci] update github actions

.github/workflows/terraform-pull-request.yaml

@@ -7,15 +7,9 @@ on:
     branches:
       - master
 jobs:
-  checkout:
-    runs-on: ubuntu-latest
-    steps:
-      - name: 'Checkout'
-        uses: actions/checkout@master
   validate:
     name: 'terraform/validate'
     runs-on: ubuntu-latest
-    needs: checkout
     strategy:
       fail-fast: false
       matrix:
@@ -25,6 +19,8 @@ jobs:
       TF_INPUT: '0'
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
+      - name: 'Checkout'
+        uses: actions/checkout@master
       - name: 'Terraform Init'
         uses: hashicorp/[email protected]
         with: