Update desktop-app.rst

[gary-sixgen]

Summary

Ticket Link

[mattermost-build]

Hello @gary-sixgen,

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[gary-sixgen]

/check-cla

[mattermost-build]

This PR has been automatically labelled "stale" because it hasn't had recent activity.
A core team member will check in on the status of the PR to help with questions.
Thank you for your contribution!

[devinbinnie]

Thanks for the fix @gary-sixgen, quick typo I found but otherwise LGTM.

[cwarnermm]

Thanks, @gary-sixgen!