Update links to documentation

Author: shahariaazam

README.md

@@ -6,7 +6,7 @@ The Routing component maps an HTTP request to a set of configuration variables.
 Resources
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-  * [Documentation](https://symfony.com/doc/current/components/routing/index.html)
+  * [Documentation](https://symfony.com/doc/current/components/routing.html)
   * [Contributing](https://symfony.com/doc/current/contributing/index.html)
   * [Report issues](https://github.com/symfony/symfony/issues) and
     [send Pull Requests](https://github.com/symfony/symfony/pulls)