Add sing-box srs custom url support for fix TUN (#5835)

Co-authored-by: 2dust <31833384+2dust@users.noreply.github.com>

v2rayN/ServiceLib/Resx/ResUI.Designer.cs

@@ -3012,7 +3012,18 @@ namespace ServiceLib.Resx {
                 return ResourceManager.GetString("TbSettingsGeoFilesSource", resourceCulture);
             }
         }
-        
+
+        /// <summary>
+        ///   查找类似 Sing-box srs files source (optional) 的本地化字符串。
+        /// </summary>
+        public static string TbSettingsSrsFilesSource
+        {
+            get
+            {
+                return ResourceManager.GetString("TbSettingsSrsFilesSource", resourceCulture);
+            }
+        }
+
         /// <summary>
         ///   查找类似 HTTP Port 的本地化字符串。
         /// </summary>