Bump py-cord to 2.7 #2409

Job	Run time
pymarkdown	11s
ruff-lint	8s
uv-check	9s
flake8	10s
pre-commit / autofix-pre-commit	3m 4s
pytest	19s
mypy (package)	26s
mypy (tests)	23s
build-and-publish	0s
release	0s
	4m 50s

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