Add sah locale (closes #3818)

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsGeneralController.kt

@@ -199,6 +199,7 @@ class SettingsGeneralController : SettingsController() {
                     "pt-BR",
                     "ro",
                     "ru",
+                    "sah",
                     "sc",
                     "sk",
                     "sr",