OEL-1283: Remove redundant info from README, but add some more useful hints.

README.md

@@ -152,21 +152,20 @@ docker-compose exec web ./vendor/bin/phpunit
 
 ### Upgrade from 1.0.0-alpha5 and earlier
 
-Target release: You can upgrade directly to the version that contains this README.md.
-
 #### Paragraphs migration
 
-Paragraphs-related theming and functionality has been moved from `oe_bootstrap_theme` to `oe_whitelabel`.
+Paragraphs-related theming and functionality has been moved from the [OpenEuropa Bootstrap base theme](https://github.com/openeuropa/oe_bootstrap_theme) to [OpenEuropa Whitelabel](https://github.com/openeuropa/oe_whitelabel).
+
+Special paragraphs fields that were introduced in `oe_bootstrap_theme_paragraphs` are being renamed in `oe_whitelabel_paragraphs`.
 
-If you have the `oe_paragraphs` module enabled, you should:
-- Create a `hook_update_N()` or `hook_post_update_NAME()` in a custom module, to enable the `oe_whitelabel_paragraphs` module.
-- Run `drush updb` in your local installation.
-- Run `drush config:export`, to export the changes.
-- For deployment, make sure that `drush updb` runs _before_ `drush config:import`.
+If you have the `oe_paragraphs` module enabled, you should create a `hook_update_N()` or `hook_post_update_NAME()` in a custom module, to enable the `oe_whitelabel_paragraphs` module during deployment.
+
+```php
+function EXAMPLE_post_update_00001(): void {
+  \Drupal::service('module_installer')->install(['oe_whitelabel_paragraphs']);
+}
+```
 
-If you did _not_ have `oe_paragraphs` enabled, but you want to do so now, you should:
-- Enable the new `oe_whitelabel_paragraphs` module in your local installation, ideally with `drush en`.
-- Export configuration, e.g. via `drush cex`. This should add the module to `core.extension.yml`.
-- For deployment, `drush config:import` will do the job. No update hook needed.
+This is needed to make sure that the install hook for `oe_whitelabel_paragraphs` runs _before_ config-import during a deployment.
 
 Note that `drush updb` will also trigger update hooks in `oe_bootstrap_theme_helper`, which will uninstall the legacy module `oe_bootstrap_theme_paragraphs`.