Rename Return function argument in documentation

[addisonhardy]

• Updated the function name passed to Return in the code documentation from do_on_process -> do_daily.
• I've enjoyed testing out the library. Thanks for releasing!

[gaby]

I think the same documentation bug is present in the advanced.py tutorial form the same folder.

[codecov-commenter]

Codecov Report

Merging #27 (7d2ab88) into master (ba26ec2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #27   +/-   ##
=======================================
  Coverage   90.06%   90.06%           
=======================================
  Files          81       81           
  Lines        3652     3652           
=======================================
  Hits         3289     3289           
  Misses        363      363           

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[Miksus]

Thanks for the contribution! Sometimes I had a hard time inventing the examples and it's good to have another pair of eyes to actually validate those.