chore: bump version to 6.0.42

update changelog to 6.0.42

Author: wjyrich

debian/changelog

@@ -1,3 +1,9 @@
+dde-session-shell (6.0.42) unstable; urgency=medium
+
+  * fix: add hardening compiler flags in debian/rules
+
+ -- WuJiangYu <[email protected]>  Thu, 03 Jul 2025 19:55:52 +0800
+
 dde-session-shell (6.0.41) unstable; urgency=medium
 
   * chore: remove unused Spanish translation files