Make ctfnote.sluggify also remove slashes

(Hopefully) fixes #6 by removing slashes from the CTF name and elsewhere when using sluggify.

organizers_bot/ctfnote.py

@@ -50,7 +50,7 @@ async def _update(self):
  "description": self.desc,
  "flag": self.flag,
  })
- await self.parent._fullupdate()
+ await self.parent._fullupdate()000f3c91
 
  async def updateTitle(self, newtitle: str):
  """
@@ -579,7 +579,7 @@ def slugify(name:str):
  npm package called slugify. We just do a best-effort approach here. If link generation fails
  in the bot, players should just use the web interface.
  """
- name = name.replace(" ", "-")
+ name = name.replace(" ", "-").replace("/", "")
  return name
 
 async def add_task(ctx: discord_slash.SlashContext, created, name: str,