Added changelog for version 1.2.1.

Author: jlesage

appdefs.xml

@@ -90,6 +90,12 @@ For more details about port forwarding, see the following links:
     </documentation>
     <!-- Changelog of the application. -->
     <history>
+      <release>
+        <version>1.2.1</version>
+        <date>2019-01-26</date>
+        <change>Upgraded Nginx Proxy Manager to version 2.0.9.</change>
+        <change level="2">Increased custom SSL certificate file size limit.</change>
+      </release>
       <release>
         <version>1.2.0</version>
         <date>2019-01-07</date>