build(deps): bump python-levenshtein from 0.25.1 to 0.26.1 in /lib/spack/docs #239

Job	Run time
changes	2s
prechecks / style	55s
prechecks / validate	39s
prechecks / bootstrap-dev-rhel8	4m 4s
prechecks / import-check	2m 48s
prechecks / audit / package-audits (windows-latest, powershell Invoke-Expression -Command "./share/spack/qa/windows_t...	5m 8s
prechecks / audit / package-audits (ubuntu-latest, bash)	8m 10s
prechecks / audit / package-audits (macos-latest, bash)	5m 0s
all-prechecks	1s
unit-tests	0s
bootstrap	0s
coverage	0s
all	0s
	26m 47s

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