fix: bump version of x/mod to compile project which is newer than go1.21

Author: timandy

go.mod

@@ -20,11 +20,10 @@ require (
 github.com/spf13/viper v1.6.2
 github.com/stretchr/testify v1.6.1
 github.com/tongjingran/copy v1.4.2
-github.com/ugorji/go v1.2.6 // indirect
-golang.org/x/mod v0.3.0
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110
+golang.org/x/mod v0.20.0
+golang.org/x/net v0.15.0
 golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
-golang.org/x/tools v0.0.0-20200730221956-1ac65761fe2c
+golang.org/x/tools v0.13.0
 google.golang.org/protobuf v1.27.1 // indirect
 gopkg.in/yaml.v2 v2.4.0 // indirect
 k8s.io/test-infra v0.0.0-20200511080351-8ac9dbfab055