Adjust installation documentation for publishing migrations and config files

[LuisLeguizamon]

In order to publish migrations or config files using the 'php artisan vendor:publish --tag='' " ' command, it is necessary to adjust the tag by adding the 'package short name' with a slash (in this case, 'medialibrary-'). This adjustment is required for compatibility with the following code snippet in the PackageServiceProvider from Spatie\LaravelPackageTools:
$this->publishes([
$filePath => $this->generateMigrationName(
$migrationFileName,
$now->addSecond()
), ], "{$this->package->shortName()}-migrations");

            $this->publishes([
                $this->package->basePath("/../config/{$configFileName}.php") => config_path("{$configFileName}.php"),
            ], "{$this->package->shortName()}-config");

[freekmurze]

Thanks!