Added February changelog

Author: wouterj

changelog.rst

@@ -27,7 +27,9 @@ New Documentation
 * `#5886 <https://github.com/symfony/symfony-docs/pull/5886>`_ [2.8] Add "How to Use Multiple Guard Authenticators" cookbook documentation (mheki)
 * `#6072 <https://github.com/symfony/symfony-docs/pull/6072>`_ Add browserkit component documentation (yamiko, yamiko-ninja, robert Parker, javiereguiluz)
 * `#6243 <https://github.com/symfony/symfony-docs/pull/6243>`_ Add missing getBoolean() method (bocharsky-bw)
+* `#6076 <https://github.com/symfony/symfony-docs/pull/6076>`_ added a sentence about the HttpException::setHeaders method (smatyas)
 * `#6231 <https://github.com/symfony/symfony-docs/pull/6231>`_ Use hash_equals instead of StringUtils::equals (WouterJ)
+* `#6186 <https://github.com/symfony/symfony-docs/pull/6186>`_ [Console] Add FormatterHelper::truncate docs (mheki)
 * `#5530 <https://github.com/symfony/symfony-docs/pull/5530>`_ [Cookbook, Security] Added user_checkers.rst (iltar)
 * `#5920 <https://github.com/symfony/symfony-docs/pull/5920>`_ Document automatic registration of extension compiler passes (WouterJ)
 * `#5724 <https://github.com/symfony/symfony-docs/pull/5724>`_ Describe configuration behaviour with multiple mailers (xelan)