Update Dockerfile to Python 3.11.0

[aOelschlager]

Link to Github issue or other discussion

issue# 1094

What does this PR do?

Pins Python version to 3.11.0

What changes were made?

Updated Python versin

How to test / verify this PR?

I just cloned isle-site-template and ran make up and then ran make demo-objects.

Interested Parties

@mjordan

---

Checklist

• Before opening this PR, have you opened an issue explaining what you want to to do?
• Have you included some configuration and/or CSV files useful for testing this PR?
• Have you written unit or integration tests if applicable?
• Does the code added in this PR require a version of Python that is higher than the current minimum version?
• If the changes in this PR require an additional Python library, have you included it in setup.py?
• If the changes in this PR add a new configuration option, have you provided a default for when the option is not present in the .yml file?

[mjordan]

Thanks!