[Task]: Complete the missing go package version in website

### What needs to happen?

Actually, I'm not sure whether it should be done.
On the website [Quickstart for Go](https://beam.apache.org/get-started/quickstart-go/#run-wordcount), the command is like this:
`go install github.com/apache/beam/sdks/v2/go/examples/wordcount`
I think it's better to add the version suffix, like "@ lastest", so newcomers can install that example without specifying it in the go.mod file.
Similar cases happened in [WordCount Examples](https://beam.apache.org/get-started/wordcount-example/).
I'm glad to submit a PR with it if it is worth doing.

### Issue Priority

Priority: 3 (nice-to-have improvement)

### Issue Components

- [ ] Component: Python SDK
- [ ] Component: Java SDK
- [ ] Component: Go SDK
- [ ] Component: Typescript SDK
- [ ] Component: IO connector
- [X] Component: Beam examples
- [ ] Component: Beam playground
- [ ] Component: Beam katas
- [X] Component: Website
- [ ] Component: Spark Runner
- [ ] Component: Flink Runner
- [ ] Component: Samza Runner
- [ ] Component: Twister2 Runner
- [ ] Component: Hazelcast Jet Runner
- [ ] Component: Google Cloud Dataflow Runner