refine doc about export via pandoc

en_us/docs/Users/Export.md

@@ -87,10 +87,16 @@ Advanced settings:
         - `%3`: the input file directories;
         - `%4`: the rendering code block CSS style file to be used;
 
-An example to use [pandoc](http://pandoc.org) to export notes:
+An example to use [Pandoc](http://pandoc.org) to export notes:
 
 ```sh
 pandoc --resource-path=.:"%3" --css="%2" --css="%4" -s -o "%1" "%0"
 ```
 
-Then if the output suffix is `pdf`, it will generate the PDF file; if it is `docx`, it will generate the DOCX file.
+::: alert-info
+
+On Windows, you need to change the separator from `:` to `;` according to Pandoc.
+
+:::
+
+If the output suffix is `pdf`, it will generate the PDF file; if it is `docx`, it will generate the DOCX file; and if it is `pptx`, it will generate the PPTX file.

en_us/docs/Users/_vnote.json

@@ -86,7 +86,7 @@
             "attachments": [
             ],
             "created_time": "2018-11-24T12:19:30Z",
-            "modified_time": "2018-11-24T12:19:40Z",
+            "modified_time": "2019-12-16T23:55:02Z",
             "name": "Export.md",
             "tags": [
             ]

zh_cn/docs/用户/_vnote.json

@@ -86,7 +86,7 @@
             "attachments": [
             ],
             "created_time": "2018-11-24T12:30:14Z",
-            "modified_time": "2018-11-24T12:35:05Z",
+            "modified_time": "2019-12-16T23:57:13Z",
             "name": "导出.md",
             "tags": [
             ]

zh_cn/docs/用户/导出.md

@@ -93,4 +93,10 @@ VNote支持将笔记导出为PDF文件。页面大小和边距是可配置的。
 pandoc --resource-path=.:"%3" --css="%2" --css="%4" -s -o "%1" "%0"
 ```
 
-如果之后输出的后缀是`pdf`，它将生成PDF文件；如果是`docx`，它将生成DOCX文件。
+::: alert-info
+
+根据Pandoc语法，Windows上，需要将分隔符`:`改为`;`。
+
+:::
+
+如果输出的后缀是`pdf`，它将生成PDF文件；如果是`docx`，它将生成DOCX文件；如果是`pptx`，它将生成PPTX文件。