docs: Update README for v4.1 release

README.md

@@ -506,6 +506,19 @@ $slugify = $container->get(Slugify\SlugifyInterface::class);
 
 ## Change Log
 
+### Version 4.1 (11 January 2022)
+
+Support for Symfony 6.
+
+- [#244](https:/cocur/slugify/pull/244) .gitignore cleanup (by [kubawerlos](https:/kubawerlos))
+- [#259](https:/cocur/slugify/pull/259) Fix portuguese-brazil language (by [stephandesouza](https:/stephandesouza))
+- [#272](https:/cocur/slugify/pull/272) Improve tests about assertions (by [peter279k](https:/peter279k))
+- [#278](https:/cocur/slugify/pull/278) Update georgian.json (by [nikameto](https:/nikameto))
+- [#299](https:/cocur/slugify/pull/299) Allow Symfony 6 and resolve depreciations (by [GromNaN](https:/GromNaN))
+- [#264](https:/cocur/slugify/pull/264) Add new Gujarati language (by [infynnoTech](https:/infynnoTech))
+- [#297](https:/cocur/slugify/pull/297) More Yoruba character support (by [9jaGuy](https:/9jaGuy))
+
+
 ### Version 4.0 (14 December 2019)
 
 Version 4 does not introduce new major features, but adds support for Symfony 4 and 5, Twig 3 and, most importantly, PHP 7.3 and 7.4.