chore: update .github/workflows/lint.yaml

.github/workflows/lint.yaml

@@ -12,6 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# NOTE: This file is automatically generated from values at:
+# https://github.com/GoogleCloudPlatform/cloud-foundation-toolkit/blob/master/infra/terraform/test-org/org/locals.tf
+
 name: 'lint'
 
 on:
@@ -32,7 +35,7 @@ jobs:
       - id: variables
         run: |
           MAKEFILE=$(find . -name Makefile -print -quit)
-          if [ ! -f $MAKEFILE ]; then
+          if [ ! -z "$MAKEFILE" ]; then
             echo dev-tools=gcr.io/cloud-foundation-cicd/cft/developer-tools:1 >> "$GITHUB_OUTPUT"
           else
             VERSION=$(grep "DOCKER_TAG_VERSION_DEVELOPER_TOOLS := " $MAKEFILE | cut -d\  -f3)