[add changelog entry]

Author: kinke

CHANGELOG.md

@@ -1,10 +1,11 @@
 # LDC master
 
 #### Big news
+- Support for [LLVM 22](https://releases.llvm.org/22.1.0/docs/ReleaseNotes.html). The prebuilt packages use v22.1.2. (#5097, #5102)
 - Minimum LLVM version raised to 18. (#5094)
 
 #### Platform support
-- Supports LLVM 18 - 21.
+- Supports LLVM 18 - 22.
 
 #### Bug fixes