Update commands.md

[Azim]

I dont know why this isnt in discord docs, but having empty space as part of option name gives "regex failed" error

[Vampire]

What is an "empty" space?
Especially compared to a "non-empty" space.

[Azim]

Poor choice of words on my part. I meant space " " symbol.
I havent tested it with special characters, but if they forbid " ", i'd expect that it only allows a-Z and 0-9

[felldo]

It is mentioned in the Discord Docs https://discord.com/developers/docs/interactions/application-commands#application-command-object-application-command-naming .

CHAT_INPUT command names and command option names must match the following regex ^[\w-]{1,32}$ with the unicode flag set. If there is a lowercase variant of any letters used, you must use those. Characters with no lowercase variants and/or uncased letters are still allowed. USER and MESSAGE commands may be mixed case and can include spaces.

And I would consider saying that spaces are not allowed is not appropiate here as there is even more that is not allowed except for ^[\w-]{1,32}$

[Saladoc]

In addition to the changes I ask you to consider, please squash your commits into one.

[Saladoc]

There really should be a description here that's also accessible to people less familiar with regex. A potential phrasing:

Suggested change

	- Command names and command option names must match the following regex `^[\w-]{1,32}$` with the unicode flag set.
	- Command names and command option names must be 1 to 32 characters long
	- Command names and command option names may only contain letters, numbers, and the underscore (`_`) and dash (`-`) characters. To be precise, they must match the regex `^[\w-]{1,32}$` with the unicode flag set.

[Saladoc]

While we're touching this up, we might as well fix this typo.

Suggested change

	- Your app cannot have two server commands within the same name on the same guild
	- Your app cannot have two server commands with the same name on the same server

[Vampire]

While you are at it, We usually call servers "server", not "guild". :-)

[Saladoc]

Suggested change

	- Your app can have a global and guild command with the same name
	- Your app can have a global and server command with the same name