Fixed issue found by @jfc3-dol when testing fix in DAD-14

Author: MikePulsiferDOL

_includes/beginners_guide.html

@@ -3,7 +3,7 @@
     application that will access the API. Registration and API keys are free.</p>
 <div class="guide_note">
     <strong>note:</strong> A separate API key is not necessary for each application, but if you reuse your key across
-    multiple apps, <a href="http://developer.dol.gov/dataset/api-metrics-key">your apps' metrics</a> will be combined
+    multiple apps, <a href="http://developer.dol.gov/others/api-metrics-per-key">your apps' metrics</a> will be combined
     and of little value.
 </div>