ansible-core: updated to 2.16.4

v2.16.4

Bugfixes

- Fix loading vars_plugins in roles (https://github.com/ansible/ansible/issues/82239).
- expect - fix argument spec error using timeout=null (https://github.com/ansible/ansible/issues/80982).
- include_vars - fix calculating ``depth`` relative to the root and ensure all files are included (https://github.com/ansible/ansible/issues/80987).
- templating - ensure syntax errors originating from a template being compiled into Python code object result in a failure (https://github.com/ansible/ansible/issues/82606)

(adam)