Fix regex for scheduled closes

Author: robinmahieu

bot.py

@@ -683,7 +683,7 @@ async def _process_blocked(self, message: discord.Message) -> bool:
                 self.blocked_users.pop(str(message.author.id))
             else:
                 reaction = blocked_emoji
-                end_time = re.search(r"%(.+?)%$", reason)
+                end_time = re.search(r"%(.+?)%", reason)
                 if end_time is not None:
                     logger.debug("No longer blocked, user %s.", message.author.name)
                     after = (