Update README.md

Author: jackton1

README.md

@@ -1,5 +1,5 @@
 # graphene-django-precommit-hook
-pre-commit hook to generate .graphql/.json graphql schema for [graphene-django](https://github.com/graphql-python/graphene-django).
+pre-commit hook to generate `.graphql` | `.json` graphql schema for [graphene-django](https://github.com/graphql-python/graphene-django).
 
 
 ## As a pre-commit hook
@@ -22,4 +22,4 @@ Sample `.pre-commit-config.yaml`
           '--settings',
           'project.settings' # Defaults to: DJANGO_SETTINGS_MODULE
         ]
-```
+```