Bump golang.org/x/crypto from 0.21.0 to 0.31.0 in /tools #424

Job	Run time
build-and-test	2m 15s
lint	1m 44s
versions	1s
copyright / validate	4s
go-checks / Check that code matches gofumpt	19s
go-checks / Check that go.mod and go.sum are tidy	20s
vault:1.17.6 kind:1.31.2	5m 55s
vault:1.18.1 kind:1.31.2	4m 49s
vault:1.16.3 kind:1.31.2	5m 52s
vault:1.18.1 kind:1.30.6	5m 57s
vault:1.18.1 kind:1.29.10	4m 54s
vault:1.18.1 kind:1.28.15	4m 55s
vault:1.18.1 kind:1.27.16	5m 54s
	42m 59s

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