Python: Fix the command for pipeline checks in DEV_SETUP.md

[tomoam]

Motivation and Context

Since .pre-commit-config.yaml was moved in #5689, I would fix the command accordingly.

Description

please see the Files Changed tab.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[markwallace-microsoft]

Python 3.8 Test Coverage Report •

File	Stmts	Miss	Cover	Missing
TOTAL	5563	1020	82%

report-only-changed-files is enabled. No files were changed during this commit :)

Python 3.8 Unit Test Overview

Tests	Skipped	Failures	Errors	Time
1207	11 💤	0 ❌	0 🔥	25.262s ⏱️