Update dependency firebase-functions to v4.7.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
firebase-functions	4.6.0 -> 4.7.0

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Release Notes

firebase/firebase-functions (firebase-functions)

### [`v4.7.0`](https://togithub.com/firebase/firebase-functions/releases/tag/v4.7.0) [Compare Source](https://togithub.com/firebase/firebase-functions/compare/v4.6.0...v4.7.0) - Fixes access on deeply nested, nonexistent property. ([#​1432](https://togithub.com/firebase/firebase-functions/issues/1432)) - Add IteratedDataSnapshot interface to match with firebase admin v12 ([#​1517](https://togithub.com/firebase/firebase-functions/issues/1517)). - Make bucket parameterizeable in storage functions ([#​1518](https://togithub.com/firebase/firebase-functions/issues/1518)) - Introduce helper library for select and multi-select input ([#​1518](https://togithub.com/firebase/firebase-functions/issues/1518))

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