BUILD/MINOR: go.mod: update Go packages #727

Job	Run time
generate-models	1m 17s
generate-specification	42s
HAProxy check commit message	0s
go mod tidy	5s
lint-spec	8s
golangci-lint	3m 22s
Build	21s
Tests	35s
e2e on HAProxy (2.1)	45s
e2e on HAProxy (2.2)	48s
e2e on HAProxy (2.3)	40s
e2e on HAProxy (2.4)	43s
e2e on HAProxy (2.5)	41s
e2e on HAProxy (2.6)	43s
e2e on HAProxy (2.7)	44s
e2e on HAProxy (2.8)	44s
	12m 18s

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