Fix the links to src/jupytext #27

Job	Run time
pre-commit / pre-commit	17s
pre-commit / lint-extension	2m 11s
codeql / codeql	2m 54s
test-pip / test-pip (3.8, ~=2.0, true)	12m 1s
test-conda / test-conda (ubuntu-latest, 3.9)	18m 13s
test-pip / test-pip (3.9, ~=2.0, true)	10m 25s
test-pip / test-pip (3.10, ~=2.0, true)	10m 2s
test-conda / test-conda (macos-latest, 3.9)	21m 36s
test-pip / test-pip (3.11, ~=2.0, true)	7m 34s
test-conda / test-conda (windows-latest, 3.9)	18m 1s
test-pip / test-pip (3.12-dev, true)	7m 57s
test-pip / test-pip (3.13-dev, true)	2m 51s
test-pip / test-pip (3.x)	12m 17s
test-pip / test-pip (3.x, ~=3.0)	13m 12s
test-pip / test-pip (3.11, ~=4.0, true)	2m 15s
test-pip / test-pip (3.x, false)	12m 30s
test-pip / test-pip (3.x, true, true)	13m 2s
build / build	2m 23s
pass	4s
	2h 49m 45s

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