chore(deps): update dependency firebase-admin to v13.6.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
firebase-admin (source)	13.5.0 -> 13.6.0

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Release Notes

firebase/firebase-admin-node (firebase-admin)

v13.6.0: Firebase Admin Node.js SDK v13.6.0

Compare Source

New Features

• feat(dc): Add executeQuery and executeMutation APIs to Data Connect (#​2979)

Miscellaneous

• [chore] Release 13.6.0 (#​3006)
• build(deps-dev): bump gulp from 5.0.0 to 5.0.1 (#​3001)
• build(deps): bump @​firebase/database-compat from 2.0.6 to 2.1.0 (#​3002)
• build(deps): bump @​fastify/busboy from 3.1.1 to 3.2.0 (#​2998)
• build(deps-dev): bump @​firebase/api-documenter from 0.4.0 to 0.5.0 (#​3000)
• build(deps): bump axios in /.github/actions/send-email (#​2983)
• chore(dc): Implement gen tracking (#​2985)
• FDC: update api version, integration tests, and CONTRIBUTING.md (#​2972)
• chore: update copyright headers from Google Inc. to Google LLC (#​2974)

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