Update create-tag.yml for Hermes (#1514)

Summary:
This is just a nit because this string is not entirely correct.

Pull Request resolved: #1514

Test Plan: Nothing to test

Reviewed By: cipolleschi

Differential Revision: D62381946

Pulled By: cortinico

fbshipit-source-id: 643aab29fc3f4fc8532f7e2d545b5a1c0844db5b

.github/workflows/create-tag.yml

@@ -6,7 +6,7 @@ on:
         description: "The React Native version that will use this tag"
         required: true
       targetSha:
-        description: "The SHA you want to tag. If not specified it will tag the HEAD of main"
+        description: "The SHA you want to tag. If not specified it will tag the HEAD of the selected branch"
         required: false
 
 jobs: