Update channel names limits in limits-specifications-teams.md

[dariomws]

Closes https://github.com/MicrosoftDocs/OfficeDocs-SkypeForBusiness-pr/issues/13683

[learn-build-service-prod[bot]]

Learn Build status updates of commit 5e6fdf0:

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Teams/limits-specifications-teams.md	:white_check_mark:Succeeded

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[scanum]

@MicrosoftHeidi PR has been copyedited and is ready for final review, could you please check and merge? Thanks!

[scanum]

@MicrosoftHeidi PR has been copyedited and is ready for final review, could you please check and merge? Thanks!

[scanum]

@MicrosoftHeidi PR has been copyedited and is ready for final review, could you please check and merge? Thanks!