fix: language types error (#14)

src/types/settings.ts

@@ -6,9 +6,9 @@ export const settingCoverageTypes: Record<number, string> = {
 
 export const nezhaLang: Record<string, string> = {
     "auto": i18next.t("Auto"),
-    "zh_CN": "简体中文（中国大陆）",
-    "zh_TW": "正體中文（台灣）",
-    "en_US": "English",
+    "zh-CN": "简体中文（中国大陆）",
+    "zh-TW": "正體中文（台灣）",
+    "en-US": "English",
 }
 
 export const wafBlockReasons: Record<number, string> = {