BUILD/MINOR: go.mod: update golang.org/x packages #524

Job	Run time
generate-models	1m 12s
generate-specification	46s
HAProxy check commit message	0s
lint-spec	6s
golangci-lint	1m 20s
go mod tidy	11s
Build	28s
Tests	30s
e2e on HAProxy (2.1)	47s
e2e on HAProxy (2.2)	48s
e2e on HAProxy (2.3)	46s
e2e on HAProxy (2.4)	45s
e2e on HAProxy (2.5)	47s
e2e on HAProxy (2.6)	52s
e2e on HAProxy (2.7)	44s
e2e on HAProxy (2.8)	46s
	10m 48s

Provide feedback