Update CHANGELOG

CHANGELOG.md

@@ -10,7 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Added additional languages to `LmntTTSService`. Languages include: `hi`, `id`,
-  `it`, `ja`, `nl`, `pl`, `ru`, `sv`, `th`, `tr`, `uk`, `vi`. 
+  `it`, `ja`, `nl`, `pl`, `ru`, `sv`, `th`, `tr`, `uk`, `vi`.
 
 - Added a `model` parameter to the `LmntTTSService` constructor, allowing
   switching between LMNT models.
@@ -59,12 +59,24 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- The API version for `CartesiaTTSService` and `CartesiaHttpTTSService` has
+  been updated. Also, the `cartesia` dependency has been updated to 2.x.
+
+- `CartesiaTTSService` and `CartesiaHttpTTSService` now support Cartesia's new
+  `speed` parameter which accepts values of `slow`, `normal`, and `fast`.
+
 - `GeminiMultimodalLiveLLMService` now uses the user transcription and usage
   metrics provided by Gemini Live.
 
 - `GoogleLLMService` has been updated to use `google-genai` instead of the
   deprecated `google-generativeai`.
 
+### Deprecated
+
+- In `CartesiaTTSService` and `CartesiaHttpTTSService`, `emotion` has been
+  deprecated by Cartesia. Pipecat is following suit and deprecating `emotion`
+  as well.
+
 ### Removed
 
 - Since `GeminiMultimodalLiveLLMService` now transcribes it's own audio, the