[BUG] Poetry installation docs are incorrect on Mac OSX 12.5.1

[ryanwoconnor]

Describe the bug
Install command for poetry does not work on Mac OSX Montery 12.5.1

To Reproduce
Steps to reproduce the behavior:

1. Go to the docs
2. Follow the instructions to install poetry, specifically the recommended instructions (found below) curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python

Expected behavior
Poetry installs fine

Actual behavior
First, python is not bundled directly with Mac OSX Montery, so the command completely fails.

Second, if you switch "python" to "python3" in the provided command, you get the attached error in screenshots.

Screenshots

Do you run eventgen with SA-eventgen?

Neither because this bug is just about installing eventgen

If you are using SA-Eventgen with Splunk (please complete the following information):
N/A

If you are using eventgen with pip module mode (please complete the following information):
N/A

Additional context

This is a blocker for installs on modern operating systems and should be addressed. If we're not going to keep the docs up to date, than we should at least point people to the poetry docs to follow their provided install instructions: https://python-poetry.org/docs/