docs: Added Announcement

[krischoi07]

Added copy to Announcements. Fixes #92

Fixes

Checklist

• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the [Contribution Guide] and my PR follows them.
• I updated my branch with the master branch.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation about the functionality in the appropriate .md file
• I have added in line documentation to the code I modified

Short description of what this PR does:

If you have questions, please send an email to Sendgrid, or file a Github Issue in this repository.

[SendGridDX]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #93 into krischoi07-patch-1 will decrease coverage by 0.12%.
The diff coverage is n/a.

@@                  Coverage Diff                   @@
##           krischoi07-patch-1      #93      +/-   ##
======================================================
- Coverage               99.45%   99.32%   -0.13%     
======================================================
  Files                       2        2              
  Lines                     182      149      -33     
======================================================
- Hits                      181      148      -33     
  Misses                      1        1

Impacted Files	Coverage Δ
smtpapi/__init__.py	98.71% <0%> (-0.3%)	⬇️
test/__init__.py	100% <0%> (ø)	⬆️

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[thinkingserious]

Hello @krischoi07,

Thanks again for the PR!

We appreciate your contribution and look forward to continued collaboration. Thanks!

Team SendGrid DX