chore: bump version to 6.0.30 (#399)

as title

Log: as title

Author: yixinshark

debian/changelog

@@ -1,3 +1,10 @@
+dde-session-shell (6.0.30) unstable; urgency=medium
+
+  * fix: Unable to open control center
+  * fix: password lineEdit can copy or cut (#398)
+
+ -- zhaoyingzhen <[email protected]>  Fri, 21 Mar 2025 10:12:01 +0800
+
 dde-session-shell (6.0.29) unstable; urgency=medium
 
   * feat: add systemReboot config