fix: 删除 dom 判断错误

@@ -39,8 +39,8 @@ function callback(mutationList, observer) {
         const nodes = mutation.addedNodes;
         nodes.forEach((node) => {
           if (
-            (node.innerText =
-              "Disconnected from the devServer, trying to reconnect...")
+            node.innerText ===
+            "Disconnected from the devServer, trying to reconnect..."
           ) {
             node.parentNode.removeChild(node);
           }