doc: release note 3.2: Update shield section

Update release note 3.2 with new shields.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

doc/releases/release-notes-3.2.rst

@@ -239,6 +239,8 @@ Boards & SoC Support
 
 * Added support for these following shields:
 
+  * ARCELI W5500 ETH
+  * Panasonic Grid-EYE (AMG88xx)
 
 Drivers and Sensors
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