Add note about global commands taking up to an hour to apply to docs (#160)

docs/guides/interactions/application-commands/slash-commands/02-creating-slash-commands.md

@@ -12,6 +12,8 @@ Guild commands are specific to the guild you specify when making them. Guild com
 
 **Note**: Apps can have a maximum of 100 global commands, and an additional 100 guild-specific commands per guild.
 
+**Note**: Global commands will take up to 1 hour to create, delete or modify on guilds. If you need to update a command quickly for testing you can create it as a guild command.
+
 If you don't have the code for a bot ready yet please follow [this guide](https://docs.stillu.cc/guides/getting_started/first-bot.html).
 
 ## SlashCommandBuilder