fix: Fix user rights

Change-Id: I9c1376cb22744b793849e5b3859463af0d72af54

Author: winstonsung

main.py

@@ -24,12 +24,18 @@
 
 @bot.command()
 async def load(ctx, extension):
+    if not ctx.author.guild_permissions.administrator:
+        await ctx.respond("你沒有權限使用這個指令！", ephemeral=True)
+        return
     bot.load_extension(f"cog.{extension}")
     await ctx.send(f"📖 {extension} loaded")
 
 
 @bot.command()
 async def unload(ctx, extension):
+    if not ctx.author.guild_permissions.administrator:
+        await ctx.respond("你沒有權限使用這個指令！", ephemeral=True)
+        return
     bot.unload_extension(f"cog.{extension}")
     await ctx.send(f"📖 {extension} unloaded")