Update grid.html.eco

Fixed missing word: row

Author: Cl3MM

server/documents/collections/grid.html.eco

@@ -813,7 +813,7 @@ themes      : ['Default']
       <h4 class="ui header">
         Stretched
       </h4>
-      <p>An can stretch its contents to take up the entire column height</p>
+      <p>A row can stretch its contents to take up the entire column height</p>
       <div class="ui three column divided grid">
         <div class="stretched row">
           <div class="column">