chore: bump version to 2.0.20

update changelog to 2.0.20

Author: mhduiy

debian/changelog

@@ -1,3 +1,11 @@
+dde-tray-loader (2.0.20) unstable; urgency=medium
+
+  * chore: switch to use nativeEventFilter
+  * fix: disable application theme saving
+  * fix: Fixed the tooltip not following the area format
+
+ -- zhangkun <[email protected]>  Thu, 25 Dec 2025 19:30:34 +0800
+
 dde-tray-loader (2.0.19) unstable; urgency=medium
 
   * i18n: Updates for project Deepin Desktop Environment (#400)