Firebase Admin Python SDK v7.6.0

New Features

• feat(appcheck): Verify one-time tokens for replay protection (#976)
• feat(ml): deprecate Machine Learning APIs (#981)

Miscellaneous

• [chore] Release 7.6.0 (#985)
• chore(ml): Skip flaky ML tests blocking nightly builds (#979)
• update GitHub Actions to Node 24 versions (#974)
• chore(ci): Fix zizmor security findings in workflows (#956)