monkey_zoo: minor fixes to monkey_zoo docs

[mssalvatore]

What does this PR do?

minor fixes to monkey_zoo docs

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the documentation framework updated to reflect the changes?

Testing Checklist

• Added relevant unit tests? (N/A)
• Have you successfully tested your changes locally? (N/A)
• If applicable, add screenshots or log transcripts of the feature working (N/A)

[codecov]

Codecov Report

Merging #927 (0bae2b9) into develop (32a8c1b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #927   +/-   ##
========================================
  Coverage    18.54%   18.54%           
========================================
  Files          338      338           
  Lines        11483    11483           
========================================
  Hits          2130     2130           
  Misses        9353     9353           

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[VakarisZ]

Nice. Ideally, we should migrate these to our doc. hub, but this one is the least important of our dev docs