chore: bump version to 2.0.7

update changelog to 2.0.7

Author: fly602

debian/changelog

@@ -1,3 +1,9 @@
+dde-session (2.0.7) unstable; urgency=medium
+
+  * fix: resolve audio service stop issue during logout
+
+ -- fuleyi <fuleyi@uniontech.com>  Fri, 10 Oct 2025 15:44:08 +0800
+
 dde-session (2.0.6) unstable; urgency=medium
 
   * fix: resolve keyring prompt issue during login by moving keyring