GKE Tests Append $GITHUB_ENV (#1777)

* append to $GITHUB_ENV

Author: BBBmau

.github/workflows/acceptance_tests_gke.yaml

@@ -9,7 +9,6 @@ on:
       zone:
         description: The GKE zone
         default: us-east1-b
-
       kubernetesVersion:
         description: The GKE kubernetes version
         default: 1.23
@@ -30,7 +29,6 @@ env:
   GOOGLE_CREDENTIALS: ${{ secrets.GOOGLE_CREDENTIALS }}
   GOOGLE_PROJECT: ${{ secrets.GOOGLE_PROJECT }}
   GOOGLE_REGION: ${{ github.event.inputs.region }}
-
   GOOGLE_ZONE: ${{github.event.inputs.zone}}
 
 jobs:
@@ -55,7 +53,6 @@ jobs:
         with:
           credentials_json: ${{ secrets.GOOGLE_CREDENTIALS }}
           access_token_lifetime: '10800s'
-
       - name: Install Terraform
         uses: hashicorp/setup-terraform@v1
         with:
@@ -74,17 +71,17 @@ jobs:
           env
           terraform init
           terraform apply -auto-approve
-          export GOOGLE_CLUSTER_NAME=`terraform output -raw cluster_name`
+          echo "GOOGLE_CLUSTER_NAME=`terraform output -raw cluster_name`" >> $GITHUB_ENV
+
       - name: Get GKE Credentials
         env:
           KUBECONFIG: ${{ github.workspace }}/kubernetes/test-infra/gke/kubeconfig
         uses: 'google-github-actions/get-gke-credentials@v0'
         with:
-          cluster_name: $GOOGLE_CLUSTER_NAME
+          cluster_name: ${{ env.GOOGLE_CLUSTER_NAME }}
           location: ${{github.event.inputs.zone}}
           project_id: ${{ secrets.GOOGLE_PROJECT }}
           use_auth_provider: true
-
       - name: Run Acceptance Test Suite
         env:
           TF_ACC_TERRAFORM_VERSION: ${{ github.event.inputs.terraformVersion }}