Getting-Started: add link to "Most Wanted" list

i.e. the list of tickets with the most upvotes

Author: Humdinger

content/development/getting-started.html

@@ -68,6 +68,13 @@ <h3>Easy Introductory Tasks</h3>
 		on it and attach a patch when you're done.
 	</li>
 </ul>
+
+<h3>Most Wanted Tasks</h3>
+Anyone with an account at our bugtracker can up/downvote specific tickets. If you
+can solve a ticket on the <a href="https://dev.haiku-os.org/report/9">"Most Wanted"</a>
+list there, you'll be instantly loved by all. Beware though, most things listed 
+are non-trivial problems...
+
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