Test on more recent Python builds

Author: SylvainDe

.github/workflows/my_github_action.yml

@@ -145,6 +145,7 @@ jobs:
         - '3.13.1'
         - '3.13.2'
         - '3.14.0-alpha.0'
+        - '3.14.0-beta.1'
 # Disabled because of issue #67        - '3.14.0-alpha.1', ..., '3.14.0-alpha.6'
         - 'pypy-2.7'
         - 'pypy-2.7-nightly'