SWI-3461 Update Ubuntu versions (#158)

Author: ajrice6713

.github/workflows/test.yaml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [windows-2022, windows-2019, ubuntu-18.04, ubuntu-20.04]
+        os: [windows-2022, windows-2019, ubuntu-20.04, ubuntu-latest]
         python-version: [3.8, 3.9, "3.10", "3.11"]
     env:
       BW_ACCOUNT_ID: ${{ secrets.BW_ACCOUNT_ID }}