BUILD/MINOR: go.mod: update Go packages #499

Job	Run time
HAProxy check commit message	0s
generate-models	1m 18s
generate-specification	1m 13s
Build	21s
go mod tidy	5s
lint-spec	8s
golangci-lint	51s
Tests	43s
e2e on HAProxy (2.1)	1m 41s
e2e on HAProxy (2.2)	2m 39s
e2e on HAProxy (2.3)	49s
e2e on HAProxy (2.4)	48s
e2e on HAProxy (2.5)	51s
e2e on HAProxy (2.6)	1m 28s
e2e on HAProxy (2.7)	1m 51s
e2e on HAProxy (2.8)	51s
	15m 37s

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