fix IfcOpenShell/IfcOpenShell#5140

Author: theoryshaw

website/templates/download.html

@@ -83,7 +83,7 @@ <h2 class="up-title title wow fadeInUp delay-0-4s"> Alpha software good luck hav
 					<div class="col-lg-12 margin-bottom-20">
                        <ul class="choose-list top-layer">
 							<li>
-								<a href="https://docs.blenderbim.org/users/installation.html">
+								<a href="https://docs.blenderbim.org/users/quickstart/installation.html">
 								Installation Guide
 								</a>
 							</li>