change default runner

Author: glegendre01

.github/workflows/integration-test-action.yaml

@@ -39,11 +39,12 @@ on:
       runs_on:
         type: string
         required: false
-        default: '["single-gpu", "nvidia-gpu", "t4", "ci"]'
+        default: 'aws-g4dn-2xlarge'
 
 jobs:
   pytorch-integration-tests:
-    runs-on: ${{ fromJson(inputs.runs_on) }}
+    runs-on:
+      group: ${{ inputs.runs_on }}
     env:
       AWS_REGION: ${{ inputs.region }}
       HF_HOME: ${{ inputs.hf_home }}
@@ -66,4 +67,4 @@ jobs:
         python -m pytest \
         ${{ inputs.test_path }} -n ${{ inputs.test_parallelism }} \
         --log-cli-level='${{ inputs.log_level }}' \
-        --log-format='${{ inputs.log_format }}'
+        --log-format='${{ inputs.log_format }}'