Fix typo

[razzeee]

Pull Request check-list

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• Does $ tox pass with this change (including linting)?
• Do the CI tests pass with this change (enable it first in your forked repo and wait for the github action build to finish)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?
• Is there an example added to the examples folder (if applicable)?
• Was the change added to CHANGES file?

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Description of change

Fixes a typo in the docs

[codecov-commenter]

Codecov Report

Merging #2043 (2ffcf46) into master (6df0019) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2043   +/-   ##
=======================================
  Coverage   92.17%   92.18%           
=======================================
  Files         100      100           
  Lines       21024    21024           
=======================================
+ Hits        19379    19381    +2     
+ Misses       1645     1643    -2     

Impacted Files	Coverage Δ
redis/commands/search/commands.py	89.02% <ø> (ø)
redis/asyncio/connection.py	82.77% <0.00%> (+0.11%)	⬆️
redis/asyncio/client.py	90.63% <0.00%> (+0.17%)	⬆️

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[chayim]

Thanks you @razzeee!