Update changelog

Author: sumitkbh

CHANGELOG.md

@@ -3,7 +3,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.4.0] - 2024-02-23
+## [0.4.0] - 2024-02-22
 
 ### Added
 
@@ -12,6 +12,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Added support to interact with models behind NeMo Inference Microservices using new model engines `nemo-embed` and `nemo-infer`.
 - Added support to provide example specific collection name for vector databases using an environment variable named `COLLECTION_NAME`.
 - Added `faiss` as a generic vector database solution behind `utils.py`.
+- New notebook for [Google Gemma](./models/Gemma)
+- Added experimental example of [RAG streaming document ingestion pipeline](./experimental/streaming_ingest_rag)
+- Added experimental example of [Multimodal RAG Assistant](./experimental/multimodal_assistant)
 
 ### Changed
 
@@ -75,4 +78,4 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Fixed
 
 - [Fixed issue #13](https://github.com/NVIDIA/GenerativeAIExamples/issues/13) of pipeline not able to answer questions unrelated to knowledge base
-- [Fixed issue #12](https://github.com/NVIDIA/GenerativeAIExamples/issues/12) typechecking while uploading PDF files
+- [Fixed issue #12](https://github.com/NVIDIA/GenerativeAIExamples/issues/12) typechecking while uploading PDF files