fix: addressing the broken indentation

this doesn't address the larger issue with a service account

Author: iennae

.github/workflows/iam-deny.yaml

@@ -46,13 +46,13 @@ jobs:
     steps:
        - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
          with:
-         ref: ${{github.event.pull_request.head.sha}}
+           ref: ${{github.event.pull_request.head.sha}}
        - uses: 'google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093' # v3.0.0
          with:
-         workload_identity_provider: 'projects/949737848314/locations/global/workloadIdentityPools/iam-deny-test-pool/providers/iam-deny-test-provider'
-         service_account: 'kokoro-ca@isakovf-iam-deny-samples.iam.gserviceaccount.com'
-         create_credentials_file: 'true'
-         access_token_lifetime: 600s
+           workload_identity_provider: 'projects/949737848314/locations/global/workloadIdentityPools/iam-deny-test-pool/providers/iam-deny-test-provider'
+           service_account: 'kokoro-ca@isakovf-iam-deny-samples.iam.gserviceaccount.com'
+           create_credentials_file: 'true'
+           access_token_lifetime: 600s
        - uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v4.0.0
          with:
           node-version: 16