Update about-email-notifications.html

[reitermb]

Summary of Changes

Adds warning re: potential email downtime
Removes dear colleague banner

Accessible

Demo here

https://reitermb.github.io/Test/knowledge-center/about-email-notifications.html

Screenshot

[lhuxraft]

LGTM! 🚀 Thank you thank you for this super quick turnaround!!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.64%. Comparing base (8ffdb0f) to head (d85f262).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3492   +/-   ##
========================================
  Coverage    90.64%   90.64%           
========================================
  Files          310      310           
  Lines         8908     8908           
  Branches       677      677           
========================================
  Hits          8075     8075           
  Misses         704      704           
  Partials       129      129           

Flag	Coverage Δ
dev-backend	90.44% <ø> (ø)
dev-frontend	92.07% <ø> (ø)

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[ADPennington]

@reitermb could you remove the dear colleague banner in this PR as well? we discussed this afternoon and no longer need it.

[reitermb]

@reitermb could you remove the dear colleague banner in this PR as well? we discussed this afternoon and no longer need it.

Updated!