Smaller landing page changes on content improvements branch (#294)

* fix letter casing on landing page

* update latest release to 5.8 on landing page

Author: alexandersandberg

index.md

@@ -11,11 +11,11 @@ Swift is a general-purpose programming language built using a modern approach to
 <div class="link-grid" markdown="1">
   <ul>
     <li>
-      <a href="/blog/swift-5.7-released">
+      <a href="/blog/swift-5.8-released">
         <div class="flex-container">
           <div class="latest-release-container">
           <span>
-            5.7
+            5.8
           </span>
           </div>
           Latest release
@@ -39,11 +39,11 @@ Swift is a general-purpose programming language built using a modern approach to
   </ul>
 </div>
 
-## why swift?
+## Why Swift?
 
 <ul class="why-swift-list">
   <li>
-    <h3>safe</h3>
+    <h3>Safe</h3>
     <p>
       Swift prioritizes safety and clarity, ensuring that code behaves in a safe manner while also promoting clear and concise programming practices.
     </p>