docs: release notes for the v2.0.5 version

Author: josantonius

CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## [2.0.5](https://github.com/josantonius/php-cookie/releases/tag/2.0.5) (2022-08-11)
+
+* Improved documentation.
+
 ## [2.0.4](https://github.com/josantonius/php-cookie/releases/tag/2.0.4) (2022-08-08)
 
 * The error handler was removed as it could override a previously created error handler or be