fix typo on use case site

pages/use-cases/index.html

@@ -19,7 +19,7 @@ <h1 style="color:#FFFFFF;">{{title}}</h1>
     <div class="row">
       <div class="col-sm-12">
         <p class="lead">
-          Crate has been designed to be a highly distributed high preforming data store. Before Crate organizations had to compromise on performance if they wanted to keep the ease of use benefits of using SQL stores or move to a No-SQL store and deal with the complexities of the query languages.<br />
+          Crate has been designed to be a highly distributed high performing data store. Before Crate organizations had to compromise on performance if they wanted to keep the ease of use benefits of using SQL stores or move to a No-SQL store and deal with the complexities of the query languages.<br />
           With Crate you get the best of both worlds: the No-SQL performance you require and the SQL syntax you want. Crate can be used for a variety of use cases, here are the most common ones we encounter:
         </p>
       </div>