fix workshop link on schedule.md

schedule.md

@@ -9,6 +9,6 @@ Don't want to give a talk? No problem! You can also suggest a solo talk, panel d
 
 <a target="_blank" href="https://github.com/TABConf/6.tabconf.com/issues/new?assignees=&labels=Panel&projects=&template=panel-discussion-submission.md&title=" class="button button2 button4">Panel Discussion</a>
 
-<a target="_blank" href="" class="button button2 button4">Workshop</a>
+<a target="_blank" href="https://github.com/TABConf/6.tabconf.com/issues/new?assignees=&labels=Workshop&projects=&template=workshop-submission.md&title=" class="button button2 button4">Workshop</a>
 
 <a target="_blank" href="https://github.com/TABConf/6.tabconf.com/issues/new?assignees=&labels=Builder+Day+Project&projects=&template=builder-day-project-submission.md&title=" class="button button2 button4">Builder Day Project</a>