Fix typeo noticed by @niklasl.

Author: gkellogg

spec/latest/json-ld-api/index.html

@@ -1069,7 +1069,7 @@ <h3>Algorithm</h3>
               <span class="changed"><code>@id</code>, <code>@type</code></span>
               or <code>@language</code>,
               <span class="changed">
-                or an <a>array</a> containing exactly any one of those keyswords,
+                or an <a>array</a> containing exactly any one of those keywords,
                 or a combination of <code>@set</code> and any of <code>@index</code>,
                 <code>@id</code>, <code>@type</code>, <code>@language</code>
                 in any order