minor #18763 [Routing] Update page_creation.rst remove confusing unstyled diff symbol (gizmola)

This PR was merged into the 5.4 branch.

Discussion
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[Routing] Update page_creation.rst remove confusing unstyled diff symbol

This is a left over from docs showing both annotation and attribute route methods.  The plus sign isn't handled because the code block is not a diff.  Issue was brought up by a confused user who thought that the plus sign was required syntax.

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Commits
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019c4e1 Update page_creation.rst remove unstyled diff symbol

Author: javiereguiluz

page_creation.rst

@@ -104,7 +104,7 @@ You can now add your route directly *above* the controller:
         // src/Controller/LuckyController.php
 
         // ...
-        + use Symfony\Component\Routing\Annotation\Route;
+        use Symfony\Component\Routing\Annotation\Route;
 
         class LuckyController
         {