bug symfony#18757 [Routing] Fix xml and yaml example for forcing https (tugmaks)

This PR was merged into the 5.4 branch.

Discussion
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[Routing] Fix xml and yaml example for forcing https

php code example works fine, but xml and yaml are not, this pr fixes it.

Commits
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16bb498 [Routing] Fix xml and yaml example for forcing https

Author: OskarStark

routing.rst

@@ -2979,8 +2979,7 @@ defined as annotations:
         controllers:
             resource: '../../src/Controller/'
             type: annotation
-            defaults:
-                schemes: [https]
+            schemes: [https]
 
     .. code-block:: xml
 
@@ -2991,9 +2990,7 @@ defined as annotations:
             xsi:schemaLocation="http://symfony.com/schema/routing
                 https://symfony.com/schema/routing/routing-1.0.xsd">
 
-            <import resource="../../src/Controller/" type="annotation">
-                <default key="schemes">HTTPS</default>
-            </import>
+            <import resource="../../src/Controller/" type="annotation" schemes="https"/>
         </routes>
 
     .. code-block:: php