Update linux-builds.yml

Added qtbase-private-dev

Author: githubuser0xFFFF

.github/workflows/linux-builds.yml

@@ -16,6 +16,7 @@ jobs:
       run: |
         sudo apt-get update --fix-missing
         sudo apt-get install qt5-default
+        sudo apt-get install qtbase5-private-dev
     - name: qmake
       run: qmake
     - name: make