go_embed_data deprecation comment is confusing and unhelpful

### What version of rules_go are you using?

v0.32.0

### What version of gazelle are you using?

v0.25.0

### What version of Bazel are you using?

5.1.1

### What did you do?

When you build something that uses go_embed_data, it prints out this message:

```
Embedding is now better handled by using rules_go's built in https://github.com/bazelbuild/rules_go/blob/master/docs/go/core/embedding.md functionality. The `bindata` rule is deprecated and will be removed in rules_go version 0.35.
```

### What did you expect to see?

I would expect to see a message that talks about the rule I'm using. I've never heard of `bindata` before.
I also expect the url in the message to go somewhere useful. E.g. at a minimum explain how to use go:embed with bazel. Preferably also explain how to migrate from go_embed_data to go:embed

### What did you see instead?

The linked page talks about the embed attribute on a go_library, not how to use `go:embed`.

Search the go_embed_data and bindata deprecation-message implementation, then read the linked rules_go embedding documentation and its go_library embed attribute guidance. Update the message and documentation so they identify the rule in use, explain go:embed with Bazel, and describe migration from go_embed_data; verify the build output and relevant documentation checks.

Written by the indexing model from the issue text.