Update install_instructions.html

Author: josevalim

src/partials/install_instructions.html

@@ -46,7 +46,7 @@ <h3>with the Livebook App</h3>
           <img class="self-center" src="/images/run_on_cloud.png" />
           <div class="self-center px-5 text-gray-700">
             <h2 class="font-semibold tracking-wide">Run in the cloud</h2>
-            <h3>on select platorms</h3>
+            <h3>on select platforms</h3>
           </div>
         </div>
         <div class="flex maxsm:flex-col md:flex-nowrap md:space-x-5">