minor #17197 [DependecyInjection] Added Uses & hints (mohamedGasmii)

This PR was submitted for the 5.4 branch but it was squashed and merged into the 4.4 branch instead.

Discussion
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[DependecyInjection] Added Uses & hints

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Commits
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0f08b16 [DependecyInjection] Added Uses & hints

Author: xabbuh

service_container.rst

@@ -352,7 +352,7 @@ you can type-hint the new ``SiteUpdateManager`` class and use it::
 
     class SiteController extends AbstractController
     {
-        public function new(SiteUpdateManager $siteUpdateManager)
+        public function new(SiteUpdateManager $siteUpdateManager): Response
         {
             // ...