chore: align Python release publishing with Ruby (#716) #155

Job	Run time
Check for changesets	4s
Dry-run publish to TestPyPI (provider)	0s
Notify Slack - Approval Needed / notify	5s
Bump versions and commit to main	57s
Publish posthog	46s
Publish posthoganalytics	53s
Publish openfeature-provider-posthog	39s
Notify Slack - Released	7s
	3m 31s

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