Consistently use sudo apt install -Uyq in workflows (two other cases)

.github/workflows/checkformat.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v7
       - name: Install clang-format
         run: |
-          sudo apt-get -Uyq install clang-format
+          sudo apt install -Uyq clang-format
       - name: Check format
         run: |
           contrib/checkformat.sh