Merge pull request #95 from pamelafox/copilot/fix-94

Update Ubuntu runner from ubuntu-20.04 to ubuntu-latest in GitHub workflow

Author: pamelafox

.github/workflows/tests.yaml

@@ -13,7 +13,7 @@ jobs:
  strategy:
  fail-fast: false
  matrix:
- os: ["ubuntu-20.04"]
+ os: ["ubuntu-latest"]
  python_version: ["3.9", "3.10", "3.11", "3.12"]
  services:
  postgres: