add changelog

Author: tkaaad97

ChangeLog.md

@@ -36,6 +36,8 @@ Bug fixes:
   [GHC issue 20074](https://gitlab.haskell.org/ghc/ghc/-/issues/20074)
 * Track changes to `setup-config` properly to avoid reconfiguring on every change.
   See [#5578](https://github.com/commercialhaskell/stack/issues/5578)
+* `stack ghci` now uses package flags in `stack.yaml`
+  [#5434](https://github.com/commercialhaskell/stack/issues/5434)
 
 ## v2.7.1