additional URL fixes

Author: Chris Cho

4.5/whats-new/index.html

@@ -323,7 +323,7 @@ <h3>
 <h1 id="what-s-new-in-4-5">What&rsquo;s new in 4.5</h1>
 
 <ul>
-<li>Refer to <a href="https://www.mongodb.com/drivers/java/sync/">What&rsquo;s New - Java Sync Documentation</a> for more information.</li>
+  <li>Refer to <a href="https://www.mongodb.com/docs/drivers/java/sync/v4.5/whats-new/">What&rsquo;s New - Java Sync Documentation</a> for more information.</li>
 </ul>
 
 <h1 id="what-s-new-in-4-4">What&rsquo;s new in 4.4</h1>

4.6/whats-new/index.html

@@ -321,10 +321,16 @@ <h3>
 </ul>
 </div>
 
+<h1 id="what-s-new-in-4-6">What&rsquo;s new in 4.6</h1>
+
+<ul>
+<li>Refer to <a href="https://www.mongodb.com/docs/drivers/java/sync/v4.6/whats-new/">What&rsquo;s New - Java Sync Documentation</a> for more information.</li>
+</ul>
+
 <h1 id="what-s-new-in-4-5">What&rsquo;s new in 4.5</h1>
 
 <ul>
-<li>Refer to <a href="https://www.mongodb.com/drivers/java/sync/">What&rsquo;s New - Java Sync Documentation</a> for more information.</li>
+<li>Refer to <a href="https://www.mongodb.com/docs/drivers/java/sync/v4.5/whats-new/">What&rsquo;s New - Java Sync Documentation</a> for more information.</li>
 </ul>
 
 <h1 id="what-s-new-in-4-4">What&rsquo;s new in 4.4</h1>