MLECO-1982: Update to using latest ethos-u embedded components

Change-Id: I744a4eb2553207004c9403b956e5bd9e9b352bfb
Signed-off-by: Isabella Gottardi <isabella.gottardi@arm.com>
diff --git a/release_notes.txt b/release_notes.txt
index 1b2ced7..62618a5 100644
--- a/release_notes.txt
+++ b/release_notes.txt
@@ -1,17 +1,24 @@
+Changes in 21.08
+    * Support for 21.05 Ethos-U component (core-software, core-driver, Vela 3.0.0).
+    * TensorFlow submodule changed to https://github.com/tensorflow/tflite-micro (tested with TensorFlow Lite Micro commit hash: f510d38d0eaa3195ce3af66e3f32648740f08afb).
+    * Image classification model changed (from uint8 to int8 datatype).
+    * Documentation updates, added support to Corstone-300 + Ethos-U65.
+    * Various scripts improvements.
+
 Changes in 21.05
     * Added script to download and optimize default models.
     * Added script to run default build flow.
     * Added a model for Anomaly Detection use case.
-    * added support for build with Arm GNU Embedded Toolchain (10.2.1).
-    * deprecated support for target subsystem SSE-200.
+    * Added support for build with Arm GNU Embedded Toolchain (10.2.1).
+    * Deprecated support for target subsystem SSE-200.
 
 Changes in 21.03
-    * simple platform support added.
-    * model conditioning examples added.
-    * documentation updated.
-    * build changed to use sources of the dependency libraries.
-    * tests for native platform added.
-    * anomaly detection use case added.
+    * Simple platform support added.
+    * Model conditioning examples added.
+    * Documentation updated.
+    * Build changed to use sources of the dependency libraries.
+    * Tests for native platform added.
+    * Anomaly detection use-case added.
 
 Changes in 20.11
     * SSE-200 and SSE-300 system support was added.