s/fullfillment/fulfillment

Author: Malvoz

README.md

@@ -117,7 +117,7 @@ This proposal is being [evaluated](https://github.com/Maps4HTML/MapML/labels/Req
 against the [Use Cases and Requirements for Standardizing Web Maps](https://maps4html.org/HTML-Map-Element-UseCases-Requirements/),
 to identify gaps between the required functionality and the polyfilled behaviour.
 
-See the [MapML UCR Fullfillment Matrix](https://maps4html.org/UCR-MapML-Matrix/mapml-ucrs-fulfillment-matrix.html)
+See the [MapML UCR Fulfillment Matrix](https://maps4html.org/UCR-MapML-Matrix/mapml-ucrs-fulfillment-matrix.html)
 for how MapML compares in capabilities in contrast to existing popular web mapping libraries.
 
 <h3 id="w3c-ogc-joint-workshop-on-maps-for-the-web">W3C/OGC Joint Workshop on Maps for the Web</h3>