Explicitly specify UTF-8 for citation generation

[JaydenR2305]

Declares encoding="utf-8" for reading the CITATIONS.cff file. For one reason or another, machines don't always default to this encoding, using instead something like cp1252. These machine-dependent encoding standards are usually incapable of reading certain characters. Explicitly specifying UTF-8 encoding will ensure documentation can be built regardless of a user's operating system.

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.71%. Comparing base (20e60aa) to head (0fa8905).
Report is 70 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2578      +/-   ##
==========================================
- Coverage   96.93%   96.71%   -0.23%     
==========================================
  Files         104      104              
  Lines        9163     9365     +202     
==========================================
+ Hits         8882     9057     +175     
- Misses        281      308      +27     

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[namurphy]

Good catch! LGTM!