fix(backup): export branch as well

backup/backup.py

@@ -44,6 +44,7 @@ class Backup(commands.Cog):
             repo_dict = {
                 "name": repo.name,
                 "url": repo.url,
+                "branch": repo.branch,
                 "cogs": []
             }
 
@@ -62,8 +63,7 @@ class Backup(commands.Cog):
     async def backup_import(self, ctx: commands.Context):
         """Import your installed repositories and cogs from an export file."""
         try:
-            export_raw = await ctx.message.attachments[0].read()
-            export = json.loads(export_raw)
+            export = json.loads(await ctx.message.attachments[0].read())
         except (json.JSONDecodeError, IndexError):
             await ctx.send(error("Please provide a valid JSON export file."))
             return