Fix typo and use cases mobile layout (#384)

Author: kaishin

assets/stylesheets/pages/_landing.scss

@@ -139,10 +139,10 @@
 .use-cases {
   @media (min-width: 1000px) {
     grid-template-columns: repeat(2, 1fr);
-  }
-  
-  li:nth-child(2n-1):nth-last-of-type(1) {
-    grid-column: span 2;
+
+    li:nth-child(2n-1):nth-last-of-type(1) {
+      grid-column: span 2;
+    }
   }
 }
 

getting-started/_go-further.md

@@ -1,6 +1,6 @@
 ## Go Further
 
-Ready to dive deeper? Here are some hand-picked resources covering about various Swift features and use.
+Ready to dive deeper? Here are some hand-picked resources covering various Swift features.
 
 <ul class="go-further-list">
   {% for resource in site.data.go_further %}