update release notes

data/com.github.ronnydo.colorpicker.appdata.xml

@@ -22,6 +22,13 @@
 	<category>Development</category>
   </categories>
   <releases>
+	​<release version="1.0.1" date="2017-07-13" urgency="medium">
+	​  <description>
+	    <ul>
+		  <li>Improvements to avoid issue #19</li>
+		</ul>
+	  </description>
+	​</release>
 	​<release version="1.0.0" date="2017-07-07" urgency="medium">
 	​  <description>
 	    <ul>