Bugfix: Python 3.9 does not support | for types.

[JosephCatrambone]

On Python 3.9 the '|' isn't supported for type unions.

python -m pdb -m guardrails hub install hub://guardrails/toxic_language
Traceback (most recent call last):
  File "/Users/josephcatrambone/.pyenv/versions/3.9.19/lib/python3.9/pdb.py", line 1703, in main
    runpy._get_module_details(mainpyfile)
  File "/Users/josephcatrambone/.pyenv/versions/3.9.19/lib/python3.9/runpy.py", line 147, in _get_module_details
    return _get_module_details(pkg_main_name, error)
  File "/Users/josephcatrambone/.pyenv/versions/3.9.19/lib/python3.9/runpy.py", line 111, in _get_module_details
    __import__(pkg_name)
  File "/Users/josephcatrambone/.virtualenvs/test_guardrails_cli/lib/python3.9/site-packages/guardrails/__init__.py", line 12, in <module>
    from guardrails.hub.install import install
  File "/Users/josephcatrambone/.virtualenvs/test_guardrails_cli/lib/python3.9/site-packages/guardrails/hub/__init__.py", line 9, in <module>
    from guardrails_grhub_toxic_language import ToxicLanguage
  File "/Users/josephcatrambone/.virtualenvs/test_guardrails_cli/lib/python3.9/site-packages/guardrails_grhub_toxic_language/__init__.py", line 1, in <module>
    from .main import ToxicLanguage
  File "/Users/josephcatrambone/.virtualenvs/test_guardrails_cli/lib/python3.9/site-packages/guardrails_grhub_toxic_language/main.py", line 21, in <module>
    class ToxicLanguage(Validator):
  File "/Users/josephcatrambone/.virtualenvs/test_guardrails_cli/lib/python3.9/site-packages/guardrails_grhub_toxic_language/main.py", line 164, in ToxicLanguage
    def _inference_local(self, model_input: str | list) -> Any:
TypeError: unsupported operand type(s) for |: 'type' and 'type'

This does a quick replace of the '|' with an explicit union and adds the 'push to GR hub on tag'.