Docs - add sles 12 to client support list
<li id="pm445741a" class="- topic/li ">Red Hat Enterprise Linux x86_64 7.x (RHEL 7)</li>
<li class="- topic/li ">Red Hat Enterprise Linux x86_64 8.x (RHEL 8)</li>
<li>Ubuntu 18.04 LTS</li>
+ <li>SUSE Linux Enterprise Server x86_64 12 (SLES 12)</li>
<!-- li dir="ltr">AIX 7.2 (64-bit) (Client and Load Tools only)</li>
<li id="pm445742" class="- topic/li ">SuSE Linux Enterprise Server x86_64 SLES 11</li> -->
<li dir="ltr">Windows 10 (32-bit and 64-bit)</li>
