Fix sponsorship logo reference

[bronzdoc]

Closes #71

[codecov]

Codecov Report

Merging #73 (d02b01f) into main (bacc62f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #73   +/-   ##
=======================================
  Coverage   95.50%   95.50%           
=======================================
  Files          24       24           
  Lines         445      445           
=======================================
  Hits          425      425           
  Misses         20       20           

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[etagwerker]

@rdormer Is anything stopping you from merging this PR? If so, please let @bronzdoc know.

[bronzdoc]

@rdormer please merge the next time