Updated changelog

Author: Progi1984

docs/changes/2.x/2.0.0.md

@@ -31,5 +31,6 @@
 - Improved Issue Template by [@Progi1984](https://github.com/Progi1984) in [#2609](https://github.com/PHPOffice/PHPWord/pull/2609)
 - Bump phpoffice/math from 0.1.0 to 0.2.0 by [@Progi1984](https://github.com/Progi1984) fixing [#2559](https://github.com/PHPOffice/PHPWord/issues/2559) in [#2645](https://github.com/PHPOffice/PHPWord/pull/2645)
 - Bump tecnickcom/tcpdf from 6.6.5 to 6.7.5 by [@dependabot](https://github.com/dependabot) in [#2646](https://github.com/PHPOffice/PHPWord/pull/2646)
+- Bump mpdf/mpdf from 8.2.2 to 8.2.4 by [@dependabot](https://github.com/dependabot) in [#2647](https://github.com/PHPOffice/PHPWord/pull/2647)
 
 ### BC Breaks