Upgrade to an Ubuntu 24.04 runner

Author: davidhalter

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ on: [push, pull_request]
 
 jobs:
   tests:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -22,7 +22,7 @@ jobs:
         run: 'make test'
 
   code-quality:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v4