[Snyk] Security upgrade python from 3.12.0a5-slim to 3.13.0b1-slim

[dinh]

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

• backend/Dockerfile

We recommend upgrading to python:3.13.0b1-slim, as this image has only 50 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
	829	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	Mature
	829	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	Mature
	614	Out-of-bounds Read SNYK-DEBIAN11-NCURSES-2767191	No Known Exploit
	614	Out-of-bounds Write SNYK-DEBIAN11-NCURSES-5421197	No Known Exploit
	614	Improper Certificate Validation SNYK-DEBIAN11-OPENSSL-3368735	No Known Exploit

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[sourcery-ai]

We have skipped reviewing this pull request. Here's why:

• It seems to have been created by a bot ('[Snyk]' found in title). We assume it knows what it's doing!
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[what-the-diff]

PR Summary

• Python version update in Dockerfile
  This PR updates the Python version used in our Docker backend setup. It shifts from an older alpha build, 3.12.0a5, to a more recent beta version 3.13.0b1. This change ensures we're using a version with the latest updates, bug-fixes and features which can improve the performance and stability of our application's backend.

[guardrails]

⚠️ We detected 1 security issue in this pull request:

Insecure Access Control (1)

Severity	Details	Docs
High	Title: Missing User Instruction sklearn_fastapi_docker/backend/Dockerfile Line 2 in 2b25f1b FROM python:3.13.0b1-slim	📚

More info on how to fix Insecure Access Control in Dockerfile.

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