chore(deps): update dependency firebase-admin to v5.3.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
firebase-admin (source, changelog)	==5.2.0 -> ==5.3.0

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Release Notes

firebase/firebase-admin-python

v5.3.0

Compare Source

New Features

• feat(firestore): Async Firestore (#​635)

Miscellaneous

• [chore] Release 5.3.0 (#​637)
• Remove failing nightly tests in project_management (#​636)
• add GitHub URL for PyPi (#​613)
• Revert "Add delayed response message for holidays (#​597)" (#​600)
• chore: Update Node.js version in CI workflow (#​602)
• Add delayed response message for holidays (#​597)

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