Bump build dependencies.

debian/changelog

@@ -1,6 +1,7 @@
 lxqt-about (2.1.0-0ubuntu1) UNRELEASED; urgency=medium
 
   * New upstream release.
+    - Bump build dependencies.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Tue, 05 Nov 2024 17:49:04 -0600
 

debian/control

@@ -8,7 +8,7 @@ Section: x11
 Priority: optional
 Build-Depends: debhelper-compat (= 13),
                libkf6windowsystem-dev,
-               liblxqt2-dev (>= 1.4.0),
+               liblxqt2-dev (>= 2.1.0),
                libx11-dev,
                qt6-svg-dev
 Standards-Version: 4.7.0