added sample output

.forgejo/actions/artifact-upload/action.yml

@@ -7,9 +7,12 @@ inputs:
     default: artifact.tar
     description: Artifact name
   path:
+    default: /bin
     description: Paths of the file or directory with the data
-    required: true
+outputs:
-outputs: {}
+  T:
+    description: just a sample output
+    value: TEST
 runs:
   using: composite
   steps: