chore: bump version to 6.5.5

update changelog to 6.5.5

Log: update changelog to 6.5.5

Author: mhduiy

debian/changelog

@@ -1,3 +1,9 @@
+deepin-screensaver (6.5.5) unstable; urgency=medium
+
+  * fix: prevent lock screen during screensaver preview (#119)
+
+ -- zhangkun <zhangkun2@uniontech.com>  Tue, 06 Jan 2026 21:14:23 +0800
+
 deepin-screensaver (6.5.4) unstable; urgency=medium
 
   * fix: prevent mouse movement from stopping preview mode