fix: Add qtbase5-dev for qmake specs

lupdate requires qmake specs which are provided by qtbase5-dev package.

Fixes error:
WARNING: Could not find qmake spec 'default'.

Author: claude

.github/workflows/update-translations.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install Qt Linguist Tools
         run: |
           sudo apt-get update
-          sudo apt-get install -y qttools5-dev-tools
+          sudo apt-get install -y qtbase5-dev qttools5-dev-tools
 
       - name: Detect workflow context
         id: context