Go: Bump to v1.23.5. #874

Job	Run time
changes	3s
e2e-test-echo	0s
cfssl	0s
fastcgi-helloserver	0s
go-grpc-greeter-server	0s
httpbun	0s
kube-webhook-certgen (v1.28.15)	2m 25s
nginx	0s
kube-webhook-certgen (v1.29.12)	2m 21s
kube-webhook-certgen (v1.30.8)	2m 26s
kube-webhook-certgen (v1.31.4)	2m 21s
kube-webhook-certgen (v1.32.0)	2m 28s
custom-error-pages / changestag	4s
custom-error-pages / Build	27s
ext-auth-example-authsvc / changestag	4s
ext-auth-example-authsvc / Build	24s
custom-error-pages / Push	0s
ext-auth-example-authsvc / Push	0s
	13m 3s

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