[Workflows] Grant Create PR workflow content write perms

[DellaBitta]

Discussion

Our staging release workflow failed to merge branch. Grant the PR creation workflow content write permissions to fix this.

Testing

N/A.

API Changes

N/A.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 4a50fba

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

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[google-oss-bot]

Size Report ¹

Affected Products

No changes between base commit (cf3c8fb) and merge commit (430c5e7).

Test Logs

• Base (cf3c8fb): https://github.com/firebase/firebase-js-sdk/actions/runs/13925855225
• Merge (430c5e7): https://github.com/firebase/firebase-js-sdk/actions/runs/13926270747

1. https://storage.googleapis.com/firebase-sdk-metric-reports/PnXTfG0KNf.html

[google-oss-bot]

Size Analysis Report ¹

Affected Products

No changes between base commit (cf3c8fb) and merge commit (430c5e7).

Test Logs

• Base (cf3c8fb): https://github.com/firebase/firebase-js-sdk/actions/runs/13925855225
• Merge (430c5e7): https://github.com/firebase/firebase-js-sdk/actions/runs/13926270747

1. https://storage.googleapis.com/firebase-sdk-metric-reports/NzJQ3yQofJ.html