Fix protocol checking for search commands

[dvora-h]

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?

NOTE: these things are not required to open a PR and can be done
afterwards / while the PR is open.

Description of change

Please provide a description of the change here.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01% ⚠️

Comparison is base (e3de026) 91.28% compared to head (8034305) 91.28%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2923      +/-   ##
==========================================
- Coverage   91.28%   91.28%   -0.01%     
==========================================
  Files         126      126              
  Lines       32391    32391              
==========================================
- Hits        29568    29567       -1     
- Misses       2823     2824       +1     

Files Changed	Coverage Δ
redis/commands/search/commands.py	85.26% <100.00%> (ø)

... and 3 files with indirect coverage changes

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