fix wrong splithttp default (#2433)

This default is defined as 1MB, but maxUploadSize is to be specified in
bytes. This confusion could've come from poorly written documentation in
xray, but it has been updated.

in general I wish that panels would not set defaults at all and instead
just omit parameters (in sharelinks, inbounds, ...) that the user didn't
set explicitly. If I want to change the defaults in xray's codebase, it
seems that all the panels will have to update the default too.

I see marzban doing the same kind of things.

web/assets/js/model/xray.js

@@ -523,7 +523,7 @@ class HTTPUpgradeStreamSettings extends XrayCommonClass {
 }
 
 class SplitHTTPStreamSettings extends XrayCommonClass {
-    constructor(path='/', host='', headers=[] , maxUploadSize= 1, maxConcurrentUploads= 10) {
+    constructor(path='/', host='', headers=[] , maxUploadSize= 1000000, maxConcurrentUploads= 10) {
         super();
         this.path = path;
         this.host = host;
@@ -2608,4 +2608,4 @@ Inbound.WireguardSettings.Peer = class extends XrayCommonClass {
             keepAlive: this.keepAlive?? undefined,
         };
     }
-};
+};