update CHANGELOG.md for v0.0.5

Author: shubham0204

CHANGELOG.md

@@ -1,5 +1,4 @@
-- The 'Download Models' screen now includes an interface to browse HuggingFace models and download them from the app
-  directly (#17)
-- Improved error handling for errors occurring in the native code (#31)
-- The 'Chat Settings' screen now includes a field to configure the model's context size (#34)
-- Sync with upstream llama.cpp (particularly for DeepSeek support)
+- Add translations for zh-CN (Chinese Simplified) (#47)
+- Add dark-theme to the app (#25)
+- Off-load model when the app is not visible on the screen (#52)
+- Add more options for configuring chat - `use_mmap`, `use_mlock`, `chat_template` and `n_threads` (#38)