MLECO-3535: update to 22.08 versions of models

* update to 22.08 release of ethos-u-vela
* update download_dependencies script to new tf revision

Signed-off-by: Nina Drozd <nina.drozd@arm.com>
Change-Id: Ib4cb47ac0881d45fc6766b6b87154584d9db7374
diff --git a/release_notes.txt b/release_notes.txt
index f4511ce..59a9d65 100644
--- a/release_notes.txt
+++ b/release_notes.txt
@@ -1,5 +1,5 @@
 Changes in 22.08
-    * Support for 22.08 Ethos-U component and dependencies (core-driver, core-platform, CMSIS, TensorFlow Lite Micro).
+    * Support for 22.08 Ethos-U component and dependencies (core-driver, core-platform, Vela 3.5.0, CMSIS, TensorFlow Lite Micro).
     * Formal support for Arm® Corstone-310 Arm Virtual Hardware and FPGA implementations.
     * Added CMake presets.
     * Bug fix for Arm® Ethos-U65 NPU's default AXI burst length.