docs(readme): restore extract-loader usage

[fruchtose]

This PR contains a:

• [ ] bugfix
• [ ] new feature
• [ ] code refactor
• [ ] test update
• [x] typo fix
• [ ] metadata update

Motivation / Use-Case

The docs mention the use of extract-loader, but the example which mentions it does not actually use it. This appears to be an unintentional change made as part of #423, as that pull request does not mention any intent to change the docs.

Additional Info

I tested the example configuration using webpack 5, html-loader v4.1.0, and extract-loader v5.1.0.

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: fruchtose / name: Robert Fruchtman (66a729fc1dcb40f30ec1d672bb0b8115a40f210a)

[codecov[bot]]

Codecov Report

Base: 92.20% // Head: 92.20% // No change to project coverage :thumbsup:

Coverage data is based on head (66a729f) compared to base (37d2073). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #459   +/-   ##
=======================================
  Coverage   92.20%   92.20%           
=======================================
  Files           7        7           
  Lines         590      590           
  Branches      190      190           
=======================================
  Hits          544      544           
  Misses         37       37           
  Partials        9        9           

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[alexander-akait]

Sorry for delay, close because of https://github.com/webpack-contrib/html-loader/issues/404