docs: fix grammar (#709) #1112

Job	Run time
Run tests with different pydantic versions	3m 48s
Run tests with coverage	2m 57s
Run linters (flake8)	1m 51s
Run tests (3.8)	2m 6s
Run linters (pydocstyle)	1m 45s
Run linters (mypy)	1m 59s
Run tests (3.9)	2m 9s
Run tests on legacy versions (3.7)	2m 16s
Run linters (pylint)	1m 56s
Run tests (3.10)	2m 15s
Run tests (3.11)	1m 59s
Run tests (3.12)	2m 5s
Run tests (3.13)	2m 14s
	29m 20s

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