Update roadmap.md

Author: franciscojavierarceo

docs/roadmap.md

@@ -7,6 +7,9 @@ The list below contains the functionality that contributors are planning to deve
 * **Natural Language Processing**
   * [x] Vector Search (Alpha release. See [RFC](https://docs.google.com/document/d/18IWzLEA9i2lDWnbfbwXnMCg3StlqaLVI-uRpQjr_Vos/edit#heading=h.9gaqqtox9jg6))
   * [ ] [Enhanced Feature Server and SDK for native support for NLP](https://github.com/feast-dev/feast/issues/4964)
+  * [ ] Keyword Search
+  * [ ] Hybrid Search
+  * [ ] Default Chunking and Sentence Embedding for RAG
 * **Data Sources**
   * [x] [Snowflake source](https://docs.feast.dev/reference/data-sources/snowflake)
   * [x] [Redshift source](https://docs.feast.dev/reference/data-sources/redshift)