fix: remove default value for exclude input

Author: salmanm

action.yml

@@ -7,7 +7,6 @@ inputs:
   exclude:
     description: "Packages that you want to manually review before upgrading"
     required: false
-    default: []
   merge-method:
     description: "The merge method you would like to use (squash, merge, rebase)"
     required: false