bot: Update LVGL submodule.

lvgl-bot · lvgl-bot · commit 1618d31b5974 · 2026-01-15T00:18:06.000Z
diff --git a/lvgl b/lvgl
@@ -1 +1 @@
-Subproject commit a86448410a179818a1848d3f23b51131646c603c
+Subproject commit 2b37b12abab84f606843f945ab366b884999d4b9
