can not handle encoded image URLs in build mode

[hronro]

Describe the bug
In the markdown file, When reference a image file with encoded URL, it works in the dev mode, but it would faild to build.

To Reproduce
Steps to reproduce the behavior:

1. a image file named image (01).png.
2. a markdown file with content like this: ![](./image%20%2801%29.png)
3. run vitepress build

Expected behavior
Should build successfully.

System Info

• vitepress version: 0.11.5
• vite version: 2.0.0-beta.62
• Node version: 2.0.0-beta.62
• OS version: Windows 10

[kiaking]

Thanks for the report! I think this is the same issue as #217. Closing this issue as a duplication.