refactor: 移除 ??= 表达式

Author: ArgoZhang

src/BootstrapBlazor/wwwroot/modules/utility.js

@@ -809,8 +809,8 @@ const deepMerge = (obj1, obj2, skipNull = true) => {
 }
 
 export function registerBootstrapBlazorModule(name, identifier, callback) {
-    window.BootstrapBlazor ??= {};
-    window.BootstrapBlazor[name] ??= {
+    window.BootstrapBlazor ||= {};
+    window.BootstrapBlazor[name] ||= {
         _init: false,
         _items: [],
         register: function (id, cb) {