Add scope input

Author: whywaita

action.yml

@@ -8,6 +8,10 @@ inputs:
   private_key:
     required: true
     description: 'Private key for the GitHub App'
+  scope:
+    required: false
+    description: 'Scope of installation account'
+    default: ''
 outputs:
   token:
     description: 'Github Token for App installation'