CI: Update ubuntu image

Author: elacuesta

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-24.04]
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         include:
           - os: macos-latest