Update favicons to the lego icon. (#546)

docs/static/icons/safari-pinned-tab.svg

@@ -0,0 +1,15 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
+ "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
+ width="904.000000pt" height="904.000000pt" viewBox="0 0 904.000000 904.000000"
+ preserveAspectRatio="xMidYMid meet">
+<metadata>
+Created by potrace 1.11, written by Peter Selinger 2001-2013
+</metadata>
+<g transform="translate(0.000000,904.000000) scale(0.100000,-0.100000)"
+fill="#000000" stroke="none">
+<path d="M0 4520 l0 -4510 4520 0 4520 0 0 4510 0 4510 -4520 0 -4520 0 0
+-4510z"/>
+</g>
+</svg>