Update site-footer.md

[chrisda]

Added note about footers not appearing on mobile devices per support case and email request.

Category

• [ ] Content fix
• [ ] New article
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[VesaJuvonen]

Docs Build status updates of commit df8cb3f:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs/features/site-footer.md	:white_check_mark:Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[VesaJuvonen]

Docs Build status updates of commit 6086761:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs/features/site-footer.md	:white_check_mark:Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[andrewconnell]

Bump @chrisda ... please address feedback so we can process your PR.

[chrisda]

Unclear what is required of me to proceed.

[andrewconnell]

My bad... I missed your edits. Will merge now.

BTW, in the future, please complete the PR template instructions that are defaulted into the body of the PR so we can easily see what this is about.