fix setting webpack public path (#5081)

src/packages/excalidraw/entry.js

@@ -1,3 +1,5 @@
+import "./publicPath";
+
 import "../../../public/fonts.css";
 
 export * from "./index";

src/packages/excalidraw/index.tsx

@@ -1,5 +1,4 @@
 import React, { useEffect, forwardRef } from "react";
-import "./publicPath";
 
 import { InitializeApp } from "../../components/InitializeApp";
 import App from "../../components/App";