CI: black docs

[Borda]

What does this PR do?

Fixes #<issue_number>

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[codecov]

Codecov Report

Merging #8566 (28447a8) into master (aadd2a9) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #8566   +/-   ##
======================================
  Coverage      92%     92%           
======================================
  Files         218     218           
  Lines       14407   14407           
======================================
  Hits        13305   13305           
  Misses       1102    1102