Update Changelog

Author: borisbstyle

changelog.html

@@ -1,7 +1,8 @@
-<span>2016.01.18 - 1.9.0 - BetaFlight</span>
+<span>2016.01.21 - 1.9.0 - BetaFlight</span>
 <ul>
     <li>Remove throttle percentage for PWM</li>
-    <li>Some cleanup</li>
+    <li>Some cleanups</li>
+    <li>Fix saving level parameters</li>
 </ul>
 <span>2016.01.16 - 1.8.9 - BetaFlight</span>
 <ul>