[Ux] Add/Update docs to show new `make:twig-component` in MakerBundle

[jrushlow]

Re: symfony/maker-bundle#1019

@weaverryan suggested updating the docs for this

make:twig-component released in MakerBundle v1.46.0

cc @kbond

[kbond]

See symfony/ux#480. You can close this issue (I don't have the ability).