BUILD/MINOR: go.mod: update Go packages #478

Job	Run time
generate-models	1m 15s
generate-specification	42s
HAProxy check commit message	0s
go mod tidy	5s
Build	21s
lint-spec	6s
golangci-lint	51s
Tests	35s
e2e on HAProxy (2.1)	51s
e2e on HAProxy (2.2)	51s
e2e on HAProxy (2.3)	47s
e2e on HAProxy (2.4)	54s
e2e on HAProxy (2.5)	53s
e2e on HAProxy (2.6)	47s
e2e on HAProxy (2.7)	47s
e2e on HAProxy (2.8)	52s
	10m 37s

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