Update cogs/modmail.py

Co-Authored-By: Taku 3 Animals <45324516+Taaku18@users.noreply.github.com>

Author: Weirdllamas

cogs/modmail.py

@@ -294,7 +294,11 @@ async def move(self, ctx, *, category: discord.CategoryChannel):
         """
         thread = ctx.thread
         await thread.channel.edit(category=category, sync_permissions=True)
-        if self.bot.config["thread_move_notify"]:
+        try:
+            thread_move_notify = strtobool(self.config["thread_move_notify"])
+        except ValueError:
+            thread_move_notify = self.config.remove("thread_move_notify")
+        if thread_move_notify:
             embed = discord.Embed(
                 title="Thread Moved",
                 description=self.bot.config["thread_move_response"],