Update dependency firebase-admin to v12.6.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
firebase-admin (source)	12.5.0 -> 12.6.0

---

Release Notes

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

v12.6.0: Firebase Admin Node.js SDK v12.6.0

Compare Source

New Features

• feat: Add Data Connect API (#​2701)

Bug Fixes

• fix(auth): Add missing Math.floor() when setting validDuration in createSessionCookie() (#​2712)

Miscellaneous

• [chore] Release 12.6.0 (#​2715)
• build(deps-dev): bump @​types/lodash from 4.17.7 to 4.17.9 (#​2710)
• build(deps-dev): bump @​firebase/app-compat from 0.2.39 to 0.2.41 (#​2711)
• build(deps-dev): bump eslint from 8.57.0 to 8.57.1 (#​2707)
• build(deps-dev): bump @​microsoft/api-extractor from 7.47.6 to 7.47.9 (#​2706)
• build(deps): bump @​google-cloud/firestore from 7.9.0 to 7.10.0 (#​2705)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[sourcery-ai]

🧙 Sourcery has finished reviewing your pull request!

---

Tips and commands

Interacting with Sourcery

• Trigger a new review: Comment @sourcery-ai review on the pull request.
• Continue discussions: Reply directly to Sourcery's review comments.
• Generate a GitHub issue from a review comment: Ask Sourcery to create an
  issue from a review comment by replying to it.

Customizing Your Experience

Access your dashboard to:

• Enable or disable review features such as the Sourcery-generated pull request
  summary, the reviewer's guide, and others.
• Change the review language.
• Add, remove or edit custom review instructions.
• Adjust other review settings.

Getting Help

• Contact our support team for questions or feedback.
• Visit our documentation for detailed guides and information.
• Keep in touch with the Sourcery team by following us on X/Twitter, LinkedIn or GitHub.

[sourcery-ai]

We have skipped reviewing this pull request. It seems to have been created by a bot (hey, renovate[bot]!). We assume it knows what it's doing!