Add link to the event on os.helmholtz.de

_posts/2021/05/2021-05-19-software-policies-workshop.md

@@ -16,7 +16,7 @@ excerpt: >
 
 ---
 
-At the workshop _Policies for Research Software_ held on May 6, 2021,
+At the workshop _[Policies for Research Software][event-link]_ held on May 6, 2021,
 over 100 participants from Helmholtz centers showed great interest.
 The intended target group (primarily Policy makers, software development team
 leaders e.g. from data centers, infrastructure units, science management,
@@ -30,7 +30,7 @@ breakout sessions.
   <a href="{% link assets/img/posts/2021-05-19-software-policies-workshop/miro_board.png %}">
     <img src="{% link assets/img/posts/2021-05-19-software-policies-workshop/miro_board.png %}" width="50%" alt="Whiteboard of the parellel sessions">
   </a>
-  <figcaption>Whiteboard of one of the parallel session.</figcaption>
+  <figcaption>Whiteboard of one of the parallel sessions.</figcaption>
 </figure>
 
 ## Workshop Material
@@ -51,3 +51,5 @@ We encourage you to join.
 <a href="https://mattermost.hzdr.de/signup_user_complete/?id=t1rh7xaksbnfpb3z7d5bahym5y" markdown=1>**<i class="fas fa-comments"></i> &nbsp;Click here to join the Mattermost chat.**</a>{:.btn .btn-primary}
 
 **The Research Software Forum is looking forward to a productive exchange with you!**
+
+[event-link]: https://os.helmholtz.de/bewusstsein-schaerfen/veranstaltungen/helmholtz-open-science-foren/helmholtz-open-science-forum-forschungssoftware/