Clarify LastStatusTime schema description in YAML

[eric-murray]

Updated the description of LastStatusTime to clarify its meaning and potential limitations.

What type of PR is this?

• correction

What this PR does / why we need it:

Current description refers to reachability rather than roaming status, is slightly ambiguous, and includes formatting recommendations no longer required by Commonalities

Which issue(s) this PR fixes:

Fixes #55

Special notes for reviewers:

None

Changelog input

 release-note
 - Clarify LastStatusTime schema description in YAML

Additional documentation

None

[rartych]

Maybe this fix: camaraproject/Commonalities#530 ( domain.com to example.com) can be applied to:

DeviceRoamingStatus/code/API_definitions/device-roaming-status.yaml

Lines 268 to 271 in 732c854

	NetworkAccessIdentifier:
	description: A public identifier addressing a subscription in a mobile network. In 3GPP terminology, it corresponds to the GPSI formatted with the External Identifier ({Local Identifier}@{Domain Identifier}). Unlike the telephone number, the network access identifier is not subjected to portability ruling in force, and is individually managed by each operator.
	type: string
	example: "123456789@domain.com"

[eric-murray]

Maybe this fix: camaraproject/Commonalities#530 ( domain.com to example.com) can be applied to:

I'll do this as a separate PR - we should try and maintain best practice of not fixing multiple issues in the same PR, and we have a lot of time until the next release

[bigludo7]

LGTM