tests: lib: gui: lvgl: Remove LV_FONT_SIMSUN_16_CJK symbol

In 9.3 due to font licensing issues LV_FONT_SIMSUN_16_CJK was deprecated.
Instead select now LV_FONT_SOURCE_HAN_SANS_SC_16_CJK symbol.

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

Author: faxe1008

tests/lib/gui/lvgl/prj.conf

@@ -68,6 +68,6 @@ CONFIG_LV_FONT_MONTSERRAT_46=y
 CONFIG_LV_FONT_MONTSERRAT_48=y
 CONFIG_LV_FONT_MONTSERRAT_28_COMPRESSED=y
 CONFIG_LV_FONT_DEJAVU_16_PERSIAN_HEBREW=y
-CONFIG_LV_FONT_SIMSUN_16_CJK=y
+CONFIG_LV_FONT_SOURCE_HAN_SANS_SC_16_CJK=y
 CONFIG_LV_FONT_UNSCII_8=y
 CONFIG_LV_USE_FONT_COMPRESSED=y