Merge pull request #1120 from tleedjarv/gha-fix

GHA: Fix some Ubuntu build fails

Author: gdt

.github/workflows/CI.yml

@@ -1055,6 +1055,8 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
+    - run: sudo apt-get update
+
     - name: Checkout code
       uses: actions/checkout@v4