[DO NOT REVIEW] github action iOS simulator

Author: jaeopt

.github/workflows/unit_tests.yml

@@ -78,9 +78,9 @@ jobs:
 
           # github actions are very poor in supporting iOS simulators:
           # - to find pre-installed xcode version, run this:
-          # > ls /Applications/
+          ls /Applications/
           # - to find supported simulator os versions, run this (and find simulator with non-error "datapath")
-          # > xcrun simctl list --json devices
+          xcrun simctl list --json devices
 
           # switch to the target xcode version
           sudo xcode-select -switch /Applications/Xcode_$SIMULATOR_XCODE_VERSION.app