Change the discord command text

[Timtendo12]

Describe the feature

Right now when people copy over the /verify {{token}} command over to discord it does not format the right way. To fix this simply change it to:

/verify token:{{token}}

Now it formats it the right way and people won't face an error in the discord client when copying over the command.

[Correct format when copying]

[Current format when copying]

I know this is something small but I've had multiple users contact me because of this. See it as making it a little bit more user-friendly :)

[tadhgboyle]

PR already open for this #3087