added sponsor credits on the en text

content/relearn.2019.en.md

@@ -68,4 +68,6 @@ Website: [relearn.be](http://relearn.be/2019/)
 → <a href="https://tumulte.domainepublic.net/cgi-bin/mailman/listinfo/relearn" class="uri">subscribe to the Relearn mailinglist </a><br>
 → <a href="https://gitlab.com/relearn" class="uri">Relearn’s gitlab repository </a><br>
 → <a href="https://webchat.freenode.net/" class="uri">IRC channel: #relearn on Freenode</a><br>
-→ <a href="https://gallery.constantvzw.org/index.php/search?album=1&amp;q=relearn" class="uri">Photographs of previous Relearn editions can be found in Constant’s gallery</a>
+→ <a href="https://gallery.constantvzw.org/index.php/search?album=1&amp;q=relearn" class="uri">Photographs of previous Relearn editions can be found in Constant’s gallery</a>
+
+<small>This event is made possible with the support of the Gemeente Rotterdam & Stimuleringsfonds Creatieve Industrie.</small>