fix action indentation

Author: Amelia Wattenbeger

action.yml

@@ -5,10 +5,9 @@ inputs:
   output_file:
     description: "A path (relative to the root of your repo) to where you would like the diagram to live. For example: images/diagram.svg. Default: diagram.svg"
     required: false
-outputs:
-  runs:
-    using: "node12"
-    main: "index.js"
-  branding:
-    color: "purple"
-    icon: "download-cloud"
+runs:
+  using: "node12"
+  main: "index.js"
+branding:
+  color: "purple"
+  icon: "download-cloud"