Updating GitHub actions CI to use Ubuntu 22.04 and 24.04 (20.04 is depreciated)

Author: jonoomph

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-22.04, ubuntu-24.04]
     steps:
     - uses: actions/checkout@v4