fix(moderation): you can no longer unban someone who is not banned

moderation/moderation.py

@@ -332,6 +332,11 @@ class Moderation(commands.Cog):
     @app_commands.command(name="unban")
     async def unban(self, interaction: discord.Interaction, target: discord.User, reason: str = None):
         """Unban a user."""
+        try:
+            await interaction.guild.fetch_ban(target)
+        except discord.errors.NotFound:
+            await interaction.response.send_message(content=f"{target.mention} is not banned!", ephemeral=True)
+            return
         if reason:
             await interaction.guild.unban(target.id, reason=f"Unbanned by {interaction.user.id} for: {reason}")
         else: