Update esthemes.sh with new theme

RetroHursty69 · web-flow · commit d78441125d26 · 2021-11-11T08:46:10.000+10:00
New theme is called synthy16x9
diff --git a/scriptmodules/supplementary/esthemes.sh b/scriptmodules/supplementary/esthemes.sh
@@ -260,6 +260,7 @@ function gui_esthemes() {
         'RetroHursty69 ComicSONIC'
         'RetroHursty69 ComicXMEN'
         'RetroHursty69 ComicZELDA'
+        'RetroHursty69 synthy16x9'
         'Saracade scv720'
         'chicueloarcade Chicuelo'
         'SuperMagicom nostalgic'
