[PY] Please migrate to the release version of dotpromptz

[yesudeep]

Describe the bug
Currently, the Python Genkit library is in alpha and uses the
git repository URL for dotprompt for its integration:

To Reproduce
See: https://github.com/firebase/genkit/blob/main/py/pyproject.toml#L85

Expected behavior
The expected behavior is to use the production release version
of dotprompt from pypi.

Screenshots
N/A

Runtime (please complete the following information):

• OS: Linux, MacOS
• Genkit Version: Python alpha

** Python version

❯ python3 --version
Python 3.13.7

Additional context
N/A