Use correct branch name for page history in OSD

Author: mmurphy

_templates/_page_openshift.html.erb

@@ -84,7 +84,7 @@
 
       <% if (distro_key != "openshift-origin") %>
       <span text-align="right" style="float: right !important">
-        <a href="https://github.com/openshift/openshift-docs/commits/enterprise-<%= (distro_key == "openshift-enterprise") ? version : ((distro_key == "openshift-dedicated") ? "3.11" : "3.11") %>/<%= repo_path %>">
+        <a href="https://github.com/openshift/openshift-docs/commits/enterprise-<%= (distro_key == "openshift-enterprise") ? version : ((distro_key == "openshift-dedicated") ? ((version == "4") ? "4.3" : "3.11") : "3.11") %>/<%= repo_path %>">
           Page history
         </a>
         <%