Add Sponsor GIS OPS

Author: joto

Diff for: _includes/sponsors.html

@@ -1,6 +1,7 @@
 <div class="sponsorlist">
     <div><a href="https://www.geofabrik.de/"><img width="40" height="40" src="{% link sponsors/geofabrik.svg %}" alt="Geofabrik" title="Geofabrik"/></a></div>
     <div><a href="https://www.cybertec-postgresql.com/"><img height="30" src="{% link sponsors/cybertec.svg %}" alt="Cybertec" title="Cybertec"/></a></div>
+    <div><a href="https://gis-ops.com/"><img height="30" src="{% link sponsors/gisops.png %}" alt="GIS•OPS" title="GIS•OPS"/></a></div>
 </div>
 
 <p>We also thank our former sponsor <a href="https://www.mapbox.com/">Mapbox</a> for their support over many years.</p>