Update wheel builder to run on latest ubuntu image

Author: stefanv

.github/workflows/wheel_tests_and_release.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-18.04]
+        os: [ubuntu-latest]
         cibw_python: ["cp38-*", "cp39-*", "cp310-*", "cp311-*"]
         cibw_manylinux: [manylinux2014]
         cibw_arch: ["x86_64"]