Adding citation note to readme

[JackUrb]

as titled

[codecov-commenter]

Codecov Report

Base: 64.10% // Head: 64.06% // Decreases project coverage by -0.04% ⚠️

Coverage data is based on head (8a511b7) compared to base (ec01e00).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #989      +/-   ##
==========================================
- Coverage   64.10%   64.06%   -0.05%     
==========================================
  Files         108      108              
  Lines        9445     9445              
==========================================
- Hits         6055     6051       -4     
- Misses       3390     3394       +4     

Impacted Files	Coverage Δ
mephisto/abstractions/architects/mock_architect.py	88.23% <0.00%> (-2.62%)	⬇️

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[pringshia]

LGTM. I had also created a duplicate PR #990 but closing that for this. Should we remove the empty newlines in the citation or is that a part of the format? Also in my PR I also just got rid of the Changelog section as that's been empty forever.