fix the misspell in main.html

Author: daveberrys

src/routes/main.html

@@ -20,7 +20,7 @@ <h1> Who are we? </h1>
                 </section>
 
                 <section class="right">
-                    <img class="preview" src="/review/Send Your Files.png" width="511" height="386" alt="Send Your Files">
+                    <img class="preview" src="/preview/Send Your Files.png" width="511" height="386" alt="Send Your Files">
                 </section>
             </div>
         </section>