docs: update CHANGELOG.md for 0.16 (TabbyML#2941)

* docs: update CHANGELOG.md for 0.16

* update release date

.changes/v0.16.0.md

@@ -0,0 +1,10 @@
+## v0.16.0 (2024-08-26)
+
+### Features
+
+* Discussion threads in the Answer Engine are now persisted, allowing users to share threads with others.
+
+### Fixed and Improvements
+
+* Fixed an issue where the llama-server subprocess was not being reused when reusing a model for Chat / Completion together (e.g., Codestral-22B) with the local model backend.
+* Updated llama.cpp to version b3571 to support the jina series embedding models.

CHANGELOG.md

@@ -5,6 +5,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html),
 and is generated by [Changie](https://github.com/miniscruff/changie).
 
+## v0.16.0 (2024-08-26)
+
+### Features
+
+* Discussion threads in the Answer Engine are now persisted, allowing users to share threads with others.
+
+### Fixed and Improvements
+
+* Fixed an issue where the llama-server subprocess was not being reused when reusing a model for Chat / Completion together (e.g., Codestral-22B) with the local model backend.
+* Updated llama.cpp to version b3571 to support the jina series embedding models.
+
 ## v0.15.0 (2024-08-08)
 
 ### Features
@@ -17,6 +28,7 @@ and is generated by [Changie](https://github.com/miniscruff/changie).
 * For linked GitHub repositories, issues and PRs are now only returned when the repository is selected.
 * Fixed GitLab issues/MRs indexing - no longer panics if the description field is null.
 * When connecting to localhost model servers, proxy settings are now skipped.
+* Allow set code completion's `max_input_length` and `max_output_tokens` in config.toml
 
 ## v0.14.0 (2024-07-23)