chore: bump version to 6.0.26 (#391)

as title

Log: as title

Author: yixinshark

debian/changelog

@@ -1,3 +1,9 @@
+dde-session-shell (6.0.26) unstable; urgency=medium
+
+  * UNRELEASED
+
+ -- Deepin Packages Builder <[email protected]>  Thu, 09 Jan 2025 16:07:47 +0800
+
 dde-session-shell (6.0.25) unstable; urgency=medium
 
   * fix: turning off 'Unlocking is required to wake up the computer' does not work