mod: default cleanup=true

action.yml

@@ -18,9 +18,9 @@ inputs:
     required: false
     default: 'false'
   cleanup:
-    description: 'Stop the buildkitd container after the job (only for single-job runners; leave false on shared runners — concurrent jobs may be using it)'
+    description: 'Stop the buildkitd container after the job (idle cleanup; container restarts on demand on the next run)'
     required: false
-    default: 'false'
+    default: 'true'
 
 runs:
   using: 'composite'