add noopener noreferrer to target link to prevent reverse tabnabbing attacks (#287)

Signed-off-by: Erlan Zholdubai uulu <[email protected]>

Author: erlan-z

web/landing_page.html

@@ -36,7 +36,7 @@ <h1>{{.Name}}</h1>
         <li><a href="{{if $.RoutePrefix}}{{ $.RoutePrefix }}{{end}}debug/pprof/heap">heap usage (memory)</a>
         <li><a href="{{if $.RoutePrefix}}{{ $.RoutePrefix }}{{end}}debug/pprof/profile?seconds=60">CPU usage (60 second profile)</a>
       </ul>
-      To visualize and share profiles you can upload to <a href="https://pprof.me" target="_blank">pprof.me</a>
+      To visualize and share profiles you can upload to <a href="https://pprof.me" target="_blank" rel="noopener noreferrer">pprof.me</a>
       </div>
     </main>
   </body>