update

README.md

@@ -51,8 +51,7 @@ print(ext.authors)
 # Developer's checklist
 
 1. Implement your own custom extension
-2. 
-Push the code on gitlab and copy the schema generated at the 1st CI job, 
+2. Push the code on gitlab and copy the schema generated at the 1st CI job, 
 or generate the json schema using `MyExtension.export_schema()`
 4. Put the json schema in `json_schema/v1.0.0/schema.json` of the repository
 5. Push the code, check pipeline status