Update coding-guide.mdc #1243

Job	Run time
Run tests with coverage	2m 51s
Run tests with different pydantic versions	3m 7s
Run linters (mypy)	1m 35s
Run tests (3.8)	1m 51s
Run tests (3.12)	1m 50s
Run linters (pydocstyle)	1m 34s
Run linters (pylint)	1m 31s
Run tests (3.9)	1m 45s
Run tests (3.11)	1m 46s
Run tests (3.13)	1m 49s
Run linters (flake8)	1m 27s
Run tests (3.10)	1m 50s
	22m 56s

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