minor #23881 [DependencyInjection] Fixed some param/return annotations in PHPDOC blocks (derrabus)

This PR was merged into the 3.3 branch.

Discussion
----------

[DependencyInjection] Fixed some param/return annotations in PHPDOC blocks

| Q             | A
| ------------- | ---
| Branch?       | 3.3
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | none
| License       | MIT
| Doc PR        | none

Commits
-------

423656f Fixed some param/return annotations in PHPDOC blocks.

src/Symfony/Component/DependencyInjection/Container.php

@@ -427,7 +427,7 @@ class Container implements ResettableContainerInterface
     /**
      * Fetches a variable from the environment.
      *
-     * @param string The name of the environment variable
+     * @param string $name The name of the environment variable
      *
      * @return scalar The value to use for the provided environment variable name
      *

src/Symfony/Component/DependencyInjection/Definition.php

@@ -71,6 +71,8 @@ class Definition
     /**
      * Sets the tracked changes for the Definition object.
      *
+     * @param array $changes An array of changes for this Definition
+     *
      * @return $this
      */
     public function setChanges(array $changes)
@@ -401,6 +403,8 @@ class Definition
      * Sets the definition templates to conditionally apply on the current definition, keyed by parent interface/class.
      *
      * @param $instanceof ChildDefinition[]
+     *
+     * @return $this
      */
     public function setInstanceofConditionals(array $instanceof)
     {