Update Changelog

CHANGELOG.md

@@ -5,17 +5,22 @@
 ### Added
 
 - **aiken-project**: `export` output now supports the functions `return_type`. @rvcas
+- **aiken-lang**: `write_bits` can now be used from aiken/builtins. @Microproofs
+
 
 ### Changed
 
 - **aiken-project**: The `aiken.toml` file no longer supports `v1` and `v2` for the plutus version field. @rvcas
 - **aiken-project**: `Error::TomlLoading` now looks much better - [see](https://github.com/aiken-lang/aiken/issues/1032#issuecomment-2562122101). @rvcas
+- **aiken-lang**: 10-20% optimization improvements via case-constr, rearranging function definitions (while maintaining dependency ordering),
+                  and allowing inlining in if_then_else_error cases which preserve the same error semantics for a program. @Microproofs
 
 ### Fixed
 
 - **aiken**: panic error when using `aiken uplc decode` on cbor encoded flat bytes. @rvcas
 - **aiken-lang**: comment formatting in pipelines leading to confusion. @rvcas
 - **aiken-lang**: preserve holes discard name in function captures (see [#1080](https://github.com/aiken-lang/aiken/issues/1080)). @KtorZ
+- **uplc**: Added deserialization match for the new builtin indices.
 
 ## v1.1.9 - 2024-12-13