Fixed changelog

Author: Sylvain MARIE

docs/changelog.md

@@ -2,8 +2,8 @@
 
 ### 1.15.4 - Python 3.13 official support
 
- - Python 3.13 is now supported. PR [#104](https://github.com/smarie/python-makefun/pull/104) by 
-   [mgorny](https://github.com/mgorny)
+ - Python 3.13 is now supported. PR [#108](https://github.com/smarie/python-makefun/pull/108) and PR
+   [#104](https://github.com/smarie/python-makefun/pull/104) by [mgorny](https://github.com/mgorny)
 
 ### 1.15.3 - bugfix