Bump github.com/olekukonko/tablewriter in /ruledocsgen #1876

Job	Run time
run-determination	4s
test (ruledocsgen/ - ubuntu-latest)	39s
test (. - windows-latest)	2m 8s
test (. - ubuntu-latest)	56s
test (ruledocsgen/ - windows-latest)	1m 27s
test (. - macos-latest)	48s
test (ruledocsgen/ - macos-latest)	38s
	6m 40s

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