doc updates [skip ci]

dev/index.html

@@ -159,7 +159,7 @@
   <section id="hnn-core">
 <h1>hnn-core<a class="headerlink" href="#hnn-core" title="Permalink to this heading">¶</a></h1>
 <p><a class="reference external" href="https://github.com/jonescompneurolab/hnn-core/actions/?query=branch:master+event:push"><img alt="tests" src="https://github.com/jonescompneurolab/hnn-core/actions/workflows/unix_unit_tests.yml/badge.svg?branch=master" /></a> <a class="reference external" href="https://circleci.com/gh/jonescompneurolab/hnn-core"><img alt="CircleCI" src="https://circleci.com/gh/jonescompneurolab/hnn-core.svg?style=svg" /></a> <a class="reference external" href="https://codecov.io/gh/jonescompneurolab/hnn-core"><img alt="Codecov" src="https://codecov.io/gh/jonescompneurolab/hnn-core/branch/master/graph/badge.svg" /></a> <a class="reference external" href="https://pypi.org/project/hnn-core/"><img alt="PyPI" src="https://img.shields.io/pypi/dm/hnn-core.svg?label=PyPI%20downloads" /></a> <a class="reference external" href="https://gitter.im/jonescompneurolab/hnn-core?utm_source=badge&amp;utm_medium=badge&amp;utm_campaign=pr-badge"><img alt="Gitter" src="https://badges.gitter.im/jonescompneurolab/hnn_core.svg" /></a> <a class="reference external" href="https://doi.org/10.21105/joss.05848"><img alt="JOSS" src="https://joss.theoj.org/papers/10.21105/joss.05848/status.svg" /></a></p>
-<p><img alt="HNN-GUI" src="https://github.com/jonescompneurolab/hnn-core/blob/acbcc4a598610dc3be5d4b0b7c59f98251ea7690/.github/images/hnn_gui.png" /></p>
+<p><img alt="HNN-GUI" src="https://raw.githubusercontent.com/jonescompneurolab/hnn-core/acbcc4a598610dc3be5d4b0b7c59f98251ea7690/.github/images/hnn_gui.png" /></p>
 <section id="about">
 <h2>About<a class="headerlink" href="#about" title="Permalink to this heading">¶</a></h2>
 <p>This is a leaner and cleaner version of the code based off the