chore(deps): update google-github-actions/auth digest to fc21748

[renovate]

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This notice will be removed on 2025-10-07.

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This PR contains the following updates:

Package	Type	Update	Change
google-github-actions/auth	action	digest	c4799db -> fc21748

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[changeset-bot]

⚠️ No Changeset found

Latest commit: 49a0490

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[google-oss-bot]

Size Report ¹

Affected Products

No changes between base commit (0ffcb26) and merge commit (558bed5).

Test Logs

• Base (0ffcb26): https://github.com/firebase/firebase-js-sdk/actions/runs/18011539903
• Merge (558bed5): https://github.com/firebase/firebase-js-sdk/actions/runs/18011610704

1. https://storage.googleapis.com/firebase-sdk-metric-reports/97Z3w9PnNF.html

[google-oss-bot]

Size Analysis Report ¹

Affected Products

No changes between base commit (0ffcb26) and merge commit (558bed5).

Test Logs

• Base (0ffcb26): https://github.com/firebase/firebase-js-sdk/actions/runs/18011539903
• Merge (558bed5): https://github.com/firebase/firebase-js-sdk/actions/runs/18011610704

1. https://storage.googleapis.com/firebase-sdk-metric-reports/v2ASloyRtN.html