[7.x] Suggest asset publishing Composer hook

[driesvints]

This PR adds the suggestion of hooking up the telescope:publish and horizon:publish commands to the app's composer.json's post-autoload-dump list. This will make sure that assets are always kept up to date and prevents breakage of the dashboards. This was inspired by Livewire's docs: https://laravel-livewire.com/docs/installation

Added a new "Upgrading Telescope" section to be in line with other first party docs.

I've also moved "Dashboard Authorization" in the Telescope docs one level down to be in sync with Horizon's docs.

[crynobone]

I normally set it under post-update-cmd since assets would just changed on composer update

I would understand that Livewire might need to republish if a new component is created etc (guessing here).

[driesvints]

@crynobone does that also work if you, for example, use composer require with the --update-with-dependencies and --update-with-all-dependencies flags?

[crynobone]

--update-with-dependencies

--update-with-all-dependencies

Yup, both triggered post-update-cmd.

[driesvints]

@crynobone Cool, thanks for verifying 🙂

Update the PR.