Fix documenter build/deploy

[Affie]

Close #851

[codecov]

Codecov Report

Merging #852 (a01b388) into master (67f4040) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #852   +/-   ##
=======================================
  Coverage   77.38%   77.38%           
=======================================
  Files          35       35           
  Lines        3025     3025           
=======================================
  Hits         2341     2341           
  Misses        684      684           

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[dehann]

Hi @Affie , i did not see this before, thanks for fixing!