Fix for Github Action - don't use custom folder if it doesn't exists

Closes #6332

Author: igorpecovnik

action.yml

@@ -143,8 +143,7 @@ runs:
         # copy os userpatches and custom
         mkdir -pv build/userpatches
         rsync -av os/userpatches/. build/userpatches/
-        #[[ -d custom/userpatches ]] && 
-        rsync -av custom/userpatches/. build/userpatches/
+        [[ -d custom/userpatches ]] && rsync -av custom/userpatches/. build/userpatches/
 
     - shell: bash
       run: |