fix words in docs

[prostomarkeloff]

this really good fix :D

[codecov]

Codecov Report

Merging #514 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #514    +/-   ##
======================================
  Coverage     100%   100%            
======================================
  Files         251    251            
  Lines        5988   5887   -101     
======================================
- Hits         5988   5887   -101

Impacted Files	Coverage Δ
...est_additional_responses_custom_validationerror.py	100% <0%> (ø)	⬆️
docs/src/app_testing/tutorial003.py	100% <0%> (ø)	⬆️
...t_query_params_str_validations/test_tutorial001.py	100% <0%> (ø)	⬆️
tests/test_custom_swagger_ui_redirect.py	100% <0%> (ø)	⬆️
docs/src/first_steps/tutorial001.py	100% <0%> (ø)	⬆️
tests/test_additional_responses_router.py	100% <0%> (ø)	⬆️
docs/src/application_configuration/tutorial001.py	100% <0%> (ø)	⬆️
tests/test_duplicate_models_openapi.py	100% <0%> (ø)	⬆️
tests/test_serialize_response_dataclass.py	100% <0%> (ø)	⬆️
...test_tutorial/test_path_params/test_tutorial005.py	100% <0%> (ø)	⬆️
... and 60 more

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[alimcmaster1]

LGTM

[tiangolo]

Oops, that's right. ✏️ 🔍 🕵️‍♂️ Thanks for your contribution @prostomarkeloff ! 🎉 🍰

And thanks @alimcmaster1 for the review!