Creating CODEOWNERS for documentation

[chayim]

This pull request uses the CODEOWNERS mechanism to define a dedicated owner for the redis.io examples. Ultimately, the people in this file should be able to override CI based on possible false positives in tests, if they are unrelated.

[codecov-commenter]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (c64ce74) 95.68% compared to head (83d953f) 95.70%.

:exclamation: Current head 83d953f differs from pull request most recent head af67a32. Consider uploading reports for the commit af67a32 to get more accurate results

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2625      +/-   ##
==========================================
+ Coverage   95.68%   95.70%   +0.02%     
==========================================
  Files         462      462              
  Lines        4607     4607              
  Branches      532      532              
==========================================
+ Hits         4408     4409       +1     
+ Misses        128      127       -1     
  Partials       71       71              

see 1 file with indirect coverage changes

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