docs: correct the feature:init hook example and note the upgrade step

Author: konradmichalik

docs/FEATURE.md

@@ -57,6 +57,8 @@ $ vendor/bin/dep feature:setup stage --feature=TEST-01
 
 The recipe already wires this task into the deploy flow, together with a `feature:init` before `deploy:info`. That ordering matters: `deploy:info` resolves `{{release_name}}` and deployer caches the result for the rest of the run, so the feature instance has to be known before it runs. Do not hook `feature:setup` any earlier yourself.
 
+> Upgrading: if your `deploy.php` carries a `before('deploy:info', 'feature:init')` (or an equivalent `feature:setup` hook) as a workaround for that ordering, remove it — the recipe registers it now and the hook would otherwise run twice.
+
 If the application needs to setup additional configuration files for e.g. storing the database credentials, use the feature templates to provide this kind of dynamic setup. For example the TYPO3 setup with a `.env` file:
 
 ```php
@@ -82,10 +84,16 @@ You can extend these list be providing more environment variables starting with
 > Hint: If you're using other deployer commands within the feature branch deployment context, you should use the `feature:init` task to extend the host definition with the necessary feature instance configuration:
 >
 > ```php
-> before('deploy:rollback', 'feature:init');
+> before('my:task', 'feature:init');
+> ```
+>
+> `feature:init` is a no-op without `--feature`, so the command keeps operating on the base instance. Use `feature:select` instead if the command should offer an interactive choice between the existing feature instances when `--feature` is omitted:
+>
+> ```php
+> before('my:task', 'feature:select');
 > ```
 >
-> `feature:init` is a no-op without `--feature`, so the command keeps operating on the base instance. Use `feature:select` instead if the command should offer an interactive choice between the existing feature instances when `--feature` is omitted.
+> `rollback` and the `debug:*` tasks are already wired to `feature:select` by the recipe.
 
 ### Deletion