[Snyk] Security upgrade python from 3.6-slim to 3.12.0b3-slim

[logangeorgebrown]

This PR was automatically created by Snyk using the credentials of a real user.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• docker/Dockerfile.python-3.6

We recommend upgrading to python:3.12.0b3-slim, as this image has only 29 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	714	Directory Traversal SNYK-DEBIAN11-DPKG-2847942	No Known Exploit
	614	Improper Input Validation SNYK-DEBIAN11-GZIP-2444256	No Known Exploit
	714	Out-of-bounds Read SNYK-DEBIAN11-LIBTASN16-3061097	No Known Exploit
	714	OS Command Injection SNYK-DEBIAN11-OPENSSL-2807596	No Known Exploit
	714	OS Command Injection SNYK-DEBIAN11-OPENSSL-2933518	No Known Exploit

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