docs(cookbook): fix two typos in the executor part

[mapleeit]

No description provided.

[codecov]

Codecov Report

Merging #2494 (8409210) into master (42a296d) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2494      +/-   ##
==========================================
+ Coverage   83.37%   83.45%   +0.07%     
==========================================
  Files         152      152              
  Lines        9414     9414              
==========================================
+ Hits         7849     7856       +7     
+ Misses       1565     1558       -7     

Flag	Coverage Δ
daemon	47.07% <100.00%> (ø)
jina	83.26% <100.00%> (+0.07%)	⬆️

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Impacted Files	Coverage Δ
jina/__init__.py	69.69% <100.00%> (ø)
jina/peapods/runtimes/jinad/client.py	87.59% <0.00%> (+5.10%)	⬆️

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