minor #6222 Updated "Learn more from the Cookbook" section (sfdumi)

This PR was submitted for the 3.0 branch but it was merged into the 2.3 branch instead (closes #6222).

Discussion
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Updated "Learn more from the Cookbook" section

Added missing links from the cookbook.

Commits
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80ac8df Updated "Learn more from the Cookbook" section

book/routing.rst

@@ -1530,5 +1530,12 @@ Learn more from the Cookbook
 ----------------------------
 
 * :doc:`/cookbook/routing/scheme`
+* :doc:`/cookbook/routing/slash_in_parameter`
+* :doc:`/cookbook/routing/redirect_in_config`
+* :doc:`/cookbook/routing/method_parameters`
+* :doc:`/cookbook/routing/service_container_parameters`
+* :doc:`/cookbook/routing/custom_route_loader`
+* :doc:`/cookbook/routing/redirect_trailing_slash`
+* :doc:`/cookbook/routing/extra_information`
 
 .. _`FOSJsRoutingBundle`: https://github.com/FriendsOfSymfony/FOSJsRoutingBundle