Make `integrate-boards` command help text more clear

[ArinGhazarian]

Description

The ado2gh integrate-boards command needs an ADO token than has access to all organizations otherwise it won't work. We need to make it clear in the command's help text to avoid any confusion.

Todo

• Update the ado2gh integrate-boards command help text and make it clear that it needs all organizations access.

Related issue

• integrate-boards throws NullReferenceException #1251