Write changelog

CHANGELOG.md

@@ -42,6 +42,7 @@
 - Associate `xsh` files with `xonsh` syntax that is Python, see #2840 (@anki-code).
 - Added auto detect syntax for `.jsonc` #2795 (@mxaddict)
 - Added auto detect syntax for `.aws/{config,credentials}` #2795 (@mxaddict)
+- Add syntax mapping for Wireguard config #2874 (@cyqsimon)
 
 ## Themes