docs: deprecate @angular/http in favor of @angular/common/http

[gnowland]

I'm submitting a...

• [ ] Bug Fix
• [ ] Feature
• [x] Other (Refactoring, Added tests, Documentation, ...)

Checklist

• [x] Commit Messages follow the Conventional Commits pattern
• [x] Docs have been added / updated (for bug fixes / features)

Description

Updated readme following Angular deprecations. See: https://angular.io/guide/deprecations#http

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Does this PR affects any existing issues?

• [ ] Yes
• [x] No

[gnowland]

Not really sure why all those commits were included...

EDIT: Nevermind, I see, wrong repository, sorry about that!