Update unlist-nuget.yml

added input for version number

Author: varndellwagglebee

.github/workflows/unlist-nuget.yml

@@ -2,6 +2,11 @@ name: Unlist NuGet
 
 on:
   workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version to unlist'
+        required: true
+        type: string
   # release:
   #   types: [deleted]