BUILD/MINOR: go.mod: update Go packages #529

Job	Run time
HAProxy check commit message	0s
generate-models	1m 26s
generate-specification	47s
lint-spec	7s
Build	25s
golangci-lint	1m 24s
go mod tidy	8s
Tests	36s
e2e on HAProxy (2.1)	46s
e2e on HAProxy (2.2)	42s
e2e on HAProxy (2.3)	47s
e2e on HAProxy (2.4)	38s
e2e on HAProxy (2.5)	37s
e2e on HAProxy (2.6)	40s
e2e on HAProxy (2.7)	39s
e2e on HAProxy (2.8)	38s
	10m 20s

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