Display latest released versions on install instructions

### Description of the feature request:

It takes at least two clicks on https://bazel.build/ to find this GitHub releases page https://github.com/bazelbuild/bazel/releases. The latest supported versions should be mentioned prominently with links to those GitHub releases.

### What underlying problem are you trying to solve with this feature?

Figure out which bazel version to use/upgrade into.

### Which operating system are you running Bazel on?

n/a

### What is the output of `bazel info release`?

n/a

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

n/a

### What's the output of `git remote get-url origin; git rev-parse master; git rev-parse HEAD` ?

```text
n/a
```

### Have you found anything relevant by searching the web?

Searching the web isn't the point. bazel.build should, at minimnum, have the latest and maybe RC versions displayed on https://bazel.build/install. A link to https://github.com/bazelbuild/bazel/releases/latest would also be nice.

### Any other information, logs, or outputs that you want to share?

_No response_