changelog: Add PR numbers for missing entries

Author: srid

CHANGELOG.md

@@ -4,8 +4,8 @@
 
 - Enhancements
   - #382: Support for cabal2nix generated expressions (avoiding IFD for local packages)
-  - Add `extraCabal2nixOptions` and `cabalFlags` to `packages.*`. The former passes custom options to `cabal2nix`. The later does the same, but formatting the flag options appropriately.
-  - Support `meta.description` in flake apps. Requires newer version of flake-parts.
+  - #418: Add `extraCabal2nixOptions` and `cabalFlags` to `packages.*`. The former passes custom options to `cabal2nix`. The later does the same, but formatting the flag options appropriately.
+  - #356: Support `meta.description` in flake apps. Requires newer version of flake-parts.
   - `settings` module:
     - #384: Add `stan`
     - #419, #421: Add `installIntermediates`, `previousIntermediates` and `separateIntermediatesOutput`