dependabot: group all gomod updates #56

Job	Run time
ci / resolve-modules / resolve-modules	4s
ci / build-and-test (./testing)	30s
ci / lint (./testing)	19s
ci / build-and-test (./cmd/examples)	1m 2s
ci / mod-tidy (./testing)	11s
ci / lint (./cmd/examples)	21s
ci / mod-tidy (./cmd/examples)	15s
ci / build-and-test (./cmd/cligen)	34s
ci / generate (./testing)	10s
ci / lint (./cmd/cligen)	22s
ci / build-and-test (.)	38s
ci / generate (./cmd/examples)	21s
ci / mod-tidy (./cmd/cligen)	16s
ci / lint (.)	20s
ci / generate (./cmd/cligen)	20s
ci / mod-tidy (.)	16s
ci / generate (.)	12s
	6m 11s

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