chore: bump version 1.99.8

log: as title

Author: tsic404

debian/changelog

@@ -1,7 +1,6 @@
 dde-shell (1.99.8) UNRELEASED; urgency=medium
 
-  * fix: Adjust the effects level of kwin to Optimal-performance, multiTasks plugin can not hide(Bug: 286871)
-  * fix: Display bubble icon normally(Bug: 286813)
+  * fix popup can not hide on treeland
 
  -- Deepin Packages Builder <[email protected]>  Fri, 29 Nov 2024 11:14:42 +0800