Bump github.com/ulikunitz/xz from 0.5.12 to 0.5.14 in /ruledocsgen #1740

Job	Run time
run-determination	4s
check-outdated (./)	19s
check-outdated (docsgen)	15s
check-errors (ruledocsgen)	44s
check-errors (./)	51s
check-style (ruledocsgen)	23s
check-errors (docsgen)	48s
check-outdated (ruledocsgen)	15s
check-style (docsgen)	26s
check-style (./)	23s
check-config (docsgen)	30s
check-formatting (docsgen)	21s
check-config (./)	21s
check-formatting (./)	22s
check-formatting (ruledocsgen)	14s
check-config (ruledocsgen)	26s
	6m 42s

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