minor symfony#56828 Fix singular phpdoc (alamirault)

This PR was merged into the 7.1 branch.

Discussion
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Fix singular phpdoc

| Q             | A
| ------------- | ---
| Branch?       | 7.1
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT

(Found while reviewing symfony#56823)

Commits
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e0f6258 Fix singular phpdoc

Author: fabpot

src/Symfony/Component/DependencyInjection/ContainerBuilder.php

@@ -880,7 +880,7 @@ public function getAlias(string $id): Alias
     /**
      * Registers a service definition.
      *
-     * This methods allows for simple registration of service definition
+     * This method allows for simple registration of service definition
      * with a fluid interface.
      */
     public function register(string $id, ?string $class = null): Definition

src/Symfony/Component/Form/FormRegistryInterface.php

@@ -21,7 +21,7 @@ interface FormRegistryInterface
     /**
      * Returns a form type by name.
      *
-     * This methods registers the type extensions from the form extensions.
+     * This method registers the type extensions from the form extensions.
      *
      * @throws Exception\InvalidArgumentException if the type cannot be retrieved from any extension
      */

src/Symfony/Component/HttpFoundation/Response.php

@@ -777,7 +777,7 @@ public function getMaxAge(): ?int
     /**
      * Sets the number of seconds after which the response should no longer be considered fresh.
      *
-     * This methods sets the Cache-Control max-age directive.
+     * This method sets the Cache-Control max-age directive.
      *
      * @return $this
      *
@@ -825,7 +825,7 @@ public function setStaleWhileRevalidate(int $value): static
     /**
      * Sets the number of seconds after which the response should no longer be considered fresh by shared caches.
      *
-     * This methods sets the Cache-Control s-maxage directive.
+     * This method sets the Cache-Control s-maxage directive.
      *
      * @return $this
      *