manifest: Update LVGL to v9.4

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

Signed-off-by: Fabian Blatz <[email protected]>

Author: faxe1008

west.yml

@@ -313,7 +313,7 @@ manifest:
       revision: fb00b383072518c918e2258b0916c996f2d4eebe
       path: modules/lib/loramac-node
     - name: lvgl
-      revision: b03edc8e6282a963cd312cd0b409eb5ce263ea75
+      revision: pull/68/head
       path: modules/lib/gui/lvgl
     - name: mbedtls
       revision: 85440ef5fffa95d0e9971e9163719189cf34d979