minor #4729 Fixed typo in factories.rst (nietonfir)

This PR was merged into the 2.6 branch.

Discussion
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Fixed typo in factories.rst

 | Q             | A
 | ------------- | ---
 | Doc fix?      | [yes]
 | New docs?     | [no]
 | Applies to    | []
 | Fixed tickets | []

Commits
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a6c47db Fixed typo in factories.rst

components/dependency_injection/factories.rst

@@ -96,7 +96,7 @@ be non-static.
                 <service id="newsletter_manager.factory" class="NewsletterManagerFactory" />
 
                 <service id="newsletter_manager" class="NewsletterManager">
-                    <factory service="newsletter_manager.factry" method="createNewsletterManager" />
+                    <factory service="newsletter_manager.factory" method="createNewsletterManager" />
                 </service>
             </services>
         </container>