chore: bump version to 2.0.84

update changelog to 2.0.84

Log: update changelog to 2.0.84

Author: mhduiy

debian/changelog

@@ -1,3 +1,12 @@
+dde-network-core (2.0.84) unstable; urgency=medium
+
+  * fix: add null check for connection update
+  * fix: fixed the wired device show error
+  * fix: replece resize to setFixedSize
+  * fix: support scroll on touch screen
+
+ -- zhangkun <zhangkun2@uniontech.com>  Thu, 05 Mar 2026 20:44:02 +0800
+
 dde-network-core (2.0.83) unstable; urgency=medium
 
   * fix: auto scan when in the wireless page