fix: 修复上传文件无法绘制markup

packages/webview/src/components/DocumentContainer/DocumentContainer.vue

@@ -185,7 +185,7 @@
       toggleButton: document.querySelector('.toggle-button')
     })
     let initialDoc = getHashParameters('d', '');
-    initialDoc = initialDoc ? JSON.parse(initialDoc) : '/example/ComPDFKit  Introduction Booklet - PDF Technologies, Inc.pdf'
+    initialDoc = initialDoc ? JSON.parse(initialDoc) : './example/ComPDFKit  Introduction Booklet - PDF Technologies, Inc.pdf'
     initialDoc = Array.isArray(initialDoc) ? initialDoc : [initialDoc]
     const activeTab = useViewer.activeTab || 0
     initialDoc = initialDoc[activeTab]