Fix json loader - it should go in 'validators' not 'utils'

Fixes #214

src/auto_archiver/modules/telethon_extractor/__manifest__.py

@@ -18,7 +18,7 @@
             "channel_invites": {
                 "default": {},
                 "help": "(JSON string) private channel invite links (format: t.me/joinchat/HASH OR t.me/+HASH) and (optional but important to avoid hanging for minutes on startup) channel id (format: CHANNEL_ID taken from a post url like https://t.me/c/CHANNEL_ID/1), the telegram account will join any new channels on setup",
-                "type": "auto_archiver.utils.json_loader",
+                "type": "json_loader",
             }
         },
     "description": """