Automatic merge from submit-queue

Fix link to apiextensions client-go example

Fixes link to client-go example for apiextensions-apiserver.

Fixing #47211.

**Special notes for your reviewer**:

When I run `hack/update-staging-client-go.sh`, I get this error:

```
!!! Error in staging/copy.sh:132
    Error in staging/copy.sh:132. 'git commit -q -m "Snapshot" > /dev/null' exited with status 1
  Call stack:
    1: staging/copy.sh:132 main(...)
  Exiting with status 1
```

What am I missing here?
/cc @caesarxuchao @sttts 

**Release note**:

```
NONE
```