Use custom role check to for title command

This ensures that if the user doesn't have the defined role, the CheckFailure raised is handled locally the way we want, rather than relying on the error-handler code

bot/exts/help_channels/_cog.py

@@ -8,6 +8,7 @@
 from bot.bot import Bot
 from bot.exts.help_channels import _caches, _channel, _message
 from bot.log import get_logger
+from bot.utils.checks import has_any_role_check
 
 log = get_logger(__name__)
 
@@ -108,7 +109,7 @@ async def rename_help_post(self, ctx: commands.Context, *, title: str) -> None:
             # Silently fail in channels other than help posts
             return
 
-        if not await commands.has_any_role(constants.Roles.helpers).predicate(ctx):
+        if not await has_any_role_check(ctx, constants.Roles.helpers):
             # Silently fail for non-helpers
             return