Working on iOS GitHub CI

Author: matthew-carroll

.github/workflows/pr_validation.yaml

@@ -79,7 +79,7 @@ jobs:
         working-directory: ./packages/flutter_test_runners/example_deep_links
 
     env:
-      EXPORT_OPTS_PATH: $RUNNER_TEMP/ExportOptions.plist
+      EXPORT_OPTS_PATH: ${{ env.RUNNER_TEMP }}/ExportOptions.plist
 
     steps:
       - name: Install the Apple certificate and provisioning profile