docs: Prepare release notes for version 0.3.0

Change-Id: I25c1105546ac0c2108225cd578d88bbccec89cfc
Refs: #2463, #2209, #2352
diff --git a/docs/index.rst b/docs/index.rst
index 7abaf35..9182cc1 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -40,6 +40,8 @@
 
 - :doc:`code-style`
 
+- :doc:`Release Notes <RELEASE_NOTES>`
+
 License
 -------