update affiliation

[jprendes]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Fixing a missing affiliation in MAINTAINERS.md

Which issue(s) this PR fixes:

Refers to #240 and #244

Special notes for your reviewer:

Does this PR introduce a user-facing change?

None

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.02%. Comparing base (57570dd) to head (375ff48).
Report is 70 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #245      +/-   ##
==========================================
+ Coverage   26.61%   29.02%   +2.41%     
==========================================
  Files          24       26       +2     
  Lines        2788     3135     +347     
  Branches     1516     1668     +152     
==========================================
+ Hits          742      910     +168     
- Misses        948     1004      +56     
- Partials     1098     1221     +123