fix(backup): fixed extract_json_from_codeblock

backup/backup.py

@@ -74,7 +74,7 @@ class Backup(commands.Cog):
             await ctx.send(error(f"You do not have the `Downloader` cog loaded. Please run `{ctx.prefix}load downloader` and try again."))
             return
 
-    def extract_json_from_codeblock(text):
+    def extract_json_from_codeblock(self, text):
         match = re.match(r"```(?:\w+)?\n(.*?)\n```", text, re.DOTALL)
         if match:
             return match.group(1).strip()