manifest: Update LVGL to v9.3

Update the west yaml to point to the new LVGL version.

Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>

Author: faxe1008

west.yml

@@ -302,7 +302,7 @@ manifest:
       revision: fb00b383072518c918e2258b0916c996f2d4eebe
       path: modules/lib/loramac-node
     - name: lvgl
-      revision: 1ed1ddd881c3784049a92bb9fe37c38c6c74d998
+      revision: cb85b35217e76a048276b63bca19e8ce7baeee08
       path: modules/lib/gui/lvgl
     - name: mbedtls
       revision: 5f889934359deccf421554c7045a8381ef75298f