Bump mkdocstrings[python-legacy] from 0.26.2 to 0.27.0 #2347

Job	Run time
EMMO documentation (test using ontodoc)	3m 29s
pytest (3.7)	4m 4s
pytest (3.8)	28s
pytest (3.9)	5m 12s
pytest (3.10)	4m 5s
pytest (3.11)	3m 58s
External / Build distribution package	15s
External / Build Documentation	1m 5s
External / Run `pre-commit`	1m 17s
External / Run `pylint` & `safety`	1m 17s
	25m 10s

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