Getting started guide is using abandoned packages

**Describe the bug**

I followed the guide at https://docs.hhvm.com/hack/getting-started/starting-a-real-project and found that the following packages are abandoned - hhvm/hhvm-autoload, facebook/difflib, facebook/fbexpect, hhvm/type-assert.

**Standalone code, or other way to reproduce the problem**

Visit https://docs.hhvm.com/hack/getting-started/starting-a-real-project and follow the guide.

**Expected behavior**

A guide that doesn't use abandoned packages.

**Actual behavior**

```
Package hhvm/hhvm-autoload is abandoned, you should avoid using it. No replacement was suggested.
Package facebook/difflib is abandoned, you should avoid using it. No replacement was suggested.
Package facebook/fbexpect is abandoned, you should avoid using it. No replacement was suggested.
Package hhvm/type-assert is abandoned, you should avoid using it. No replacement was suggested.
```

**Environment**
- Operating system
Ubuntu 20.04 in Docker
- Installation method
apt-get with dl.hhvm.com repository
- HHVM Version
```
$ hhvm --version
HipHop VM 4.172.1 (rel) (non-lowptr)
Compiler: 1674160842_830863609
Repo schema: cf1b330880a6f9fdad1a6212563bd3d2544e68a0

$ hh_client --version
hackc-ae3b9a25eaad0eb57e21b53488ef326414baccef-4.172.1
```