MLBEDSW-5417: Update release notes & supported ops

This commit updates the release notes for Vela
version 3.2.0.
It also updates the SUPPORTED_OPS.md file with new
constraints.
Updated the API version as a result of the bug fix
commit 399c4a2d77df791e5d988c51d7fb1824ac4f266f.
Updated Vela version in setup.py.

Signed-off-by: Dwight Lidman <dwight.lidman@arm.com>
Change-Id: I181e89f639a1da6013e8511ebe2d7e4f81242916
diff --git a/ethosu/vela/api.py b/ethosu/vela/api.py
index d516b8d..f49df25 100644
--- a/ethosu/vela/api.py
+++ b/ethosu/vela/api.py
@@ -27,7 +27,7 @@
 
 
 API_VERSION_MAJOR = 1
-API_VERSION_MINOR = 1
+API_VERSION_MINOR = 2
 API_VERSION = f"{API_VERSION_MAJOR}.{API_VERSION_MINOR}"