Go: Bump to v1.22.6. #362

Job	Run time
changes	3s
cfssl	0s
e2e-test-echo	0s
fastcgi-helloserver	0s
go-grpc-greeter-server	0s
httpbun	0s
kube-webhook-certgen (v1.26.15)	2m 52s
nginx125	0s
kube-webhook-certgen (v1.27.13)	3m 6s
kube-webhook-certgen (v1.28.9)	3m 10s
opentelemetry (1.25.3)	6m 34s
kube-webhook-certgen (v1.29.4)	2m 37s
opentelemetry (1.21.6)	6m 3s
kube-webhook-certgen (v1.30.0)	2m 40s
custom-error-pages / changestag	3s
custom-error-pages / Build	24s
ext-auth-example-authsvc / changestag	5s
ext-auth-example-authsvc / Build	25s
custom-error-pages / Push	0s
ext-auth-example-authsvc / Push	0s
	28m 2s

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