Updating doc links

Resolving https://github.com/wso2/product-iots/issues/1694

components/device-mgt/org.wso2.carbon.device.mgt.ui/src/main/resources/jaggeryapps/devicemgt/app/units/cdmf.unit.device.types.listing/listing.hbs

@@ -43,7 +43,7 @@
                 <i class="fw fw-mobile fw-3x"></i>
             </h3>
             <h3 class="text-muted">No device type is available to be displayed.</h3>
-            <a href="https://docs.wso2.com/display/IoTS300/Quick+Start+Guide" target="_blank"
+            <a href="https://docs.wso2.com/display/IoTS320/Quick+Start+Guide" target="_blank"
                class="btn-operations btn-default">
                 <span class="fw-stack">
                     <i class="fw fw-circle-outline fw-stack-2x"></i>