Edit doc referring to old centerOption behaviour

[Jojain]

This part of the doc was referring to the centerOption being the centerOfMass of a face by default. I changed it to refer to the new behaviour

[codecov]

Codecov Report

Merging #847 (c76c9ff) into master (8dc4972) will not change coverage.
The diff coverage is n/a.

❗ Current head c76c9ff differs from pull request most recent head 3290772. Consider uploading reports for the commit 3290772 to get more accurate results

@@           Coverage Diff           @@
##           master     #847   +/-   ##
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  Coverage   95.89%   95.89%           
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  Files          32       32           
  Lines        7594     7594           
  Branches      806      806           
=======================================
  Hits         7282     7282           
  Misses        184      184           
  Partials      128      128           

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[jmwright]

Thanks @Jojain

[marcus7070]

The failed tests are network errors, RTD succeeded and that's all that's relevant so I'm merging.

Thanks @Jojain!