Use recent github runner

Author: bnf

.github/workflows/tests.yml

@@ -2,7 +2,7 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v1
       - uses: ddev/github-action-setup-ddev@v1