Explicit bump to go 1.20

Signed-off-by: Monis Khan <mok@microsoft.com>

Kubernetes-commit: ba471884fba92246e1547ce4a27f9d5e735afc60

Author: enj

go.mod

@@ -2,7 +2,7 @@
 
 module k8s.io/apimachinery
 
-go 1.19
+go 1.20
 
 require (
 	github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5
@@ -50,3 +50,5 @@ require (
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
+
+replace k8s.io/apimachinery => ../apimachinery