Add graalpy to CI

Author: msimacek

.github/workflows/ci.yml

@@ -39,6 +39,7 @@ jobs:
         - 'pypy-3.8'
         - 'pypy-3.9'
         - 'pypy-3.10'
+        - 'graalpy-24.1'
 
         # Items in here will either be added to the build matrix (if not
         # present), or add new keys to an existing matrix element if all the