Replace UpdateCheckFrequency key with UpdateCheckInterval in com.microsoft.autoupdate2

[kryptonit1]

Name of App / Payload:
com.microsoft.autoupdate2

Preference key(s) needing fixing:
Add UpdateCheckInterval and remove UpdateCheckFrequency.

Description of problem(s) / error(s) with listed key(s):
UpdateCheckFrequency is deprecated and has been replaced by UpdateCheckInterval.

Description of expected behavior:
N/A

How are you testing / deploying your profile?:
N/A

[kevinmcox]

Thanks for the issue @kryptonit1. This would be a great one to submit as a first PR if you are interested in giving it a shot.