(fix) Fix reference to ubuntu OS in the run-test GitHub workflow

Author: abel

.github/workflows/run-tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         python: ["3.9", "3.10", "3.11"]
-        os: [ubuntu-18.04, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     env:
       OS: ${{ matrix.os }}
@@ -43,4 +43,3 @@ jobs:
         uses: codecov/codecov-action@v3
         with:
           env_vars: OS,PYTHON
-          verbose: true