Fix docstring for evaluate

[kmaziarz]

This PR fixes a few things in the docstring for evaluate:

• adds the missing description for log_dict
• drops the description for non-existent n_decorrelate
• fixes the docstring order so that it matched the argument list

[codecov]

Codecov Report

Merging #44 (f621513) into master (d5655e9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #44   +/-   ##
=======================================
  Coverage   80.79%   80.79%           
=======================================
  Files          27       27           
  Lines        1770     1770           
  Branches      250      250           
=======================================
  Hits         1430     1430           
  Misses        243      243           
  Partials       97       97           

Impacted Files	Coverage Δ
src/deepqmc/evaluate.py	95.34% <ø> (ø)

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