Python release notes

[p-m-s-f]

Internal Notes for Reviewers

Responding to this story.

This script is meant to generate release notes based on PRs in the validmind-python repo. While the script doesn't return any errors, at present it doesn't properly generate release notes.

By adding references to the python repo to the gh commands, the script accesses the python repo instead of the docs repo. However, this won't work unless you have a version of the python repo downloaded locally. Additionally, as a side effect of working on a Windows machine, I've had to manually set the encoding to utf-8 throughout the script.

References to documentation in the generate_release_notes script have been replaced with dependencies for the python specific version. This was mainly for testing purposes, as the dependencies tag was the only label attached to any of the 30 previous merged PRs. Previously, references to documentation had been replaced with python.

[nrichers]

This PR has been incorporated into #121, closing. Thank you for all your work on this, @p-m-s-f!