Bug:we add a file called resume.html in _layouts document,and then we couldn't import image in this file

[936187425]

resume.html content :

html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
head>
meta name="generator" content="jemdoc, see http://jemdoc.jaboc.net/" />
meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
/head>
body>
img src="resume.png" alt="resume" width="175px" height="230px" /> 
/body>

resume.png location:
we take the resume.png to _layouts document.
problem:
Error reading file/936187425.github.io/_layouts/resume.png: invalid byte sequence in UTF-8
Jekyll Feed: Generating feed for posts
Liquid Exception: invalid byte sequence in UTF-8 in /936187425.github.io/_layouts/resume.png