gomod: bump golang.org/x/mod from 0.20.0 to 0.21.0 (#43) #78

Job	Run time
ci / resolve-modules / resolve-modules	3s
ci / build-and-test (./testing)	22s
ci / lint (./testing)	19s
ci / mod-tidy (./testing)	16s
ci / build-and-test (./cmd/cligen)	26s
ci / lint (./cmd/cligen)	27s
ci / build-and-test (./cmd/examples)	24s
ci / generate (./testing)	15s
ci / lint (./cmd/examples)	21s
ci / mod-tidy (./cmd/cligen)	11s
ci / build-and-test (.)	23s
ci / lint (.)	22s
ci / mod-tidy (./cmd/examples)	15s
ci / generate (./cmd/cligen)	25s
ci / mod-tidy (.)	11s
ci / generate (./cmd/examples)	20s
ci / generate (.)	12s
	5m 12s

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