chore(deps): update dependency firebase-admin to v5 (GoogleCloudPlatform#5763)

Co-authored-by: Dan Lee <71398022+dandhlee@users.noreply.github.com>

Author: renovate-bot

run/idp-sql/requirements.txt

@@ -2,6 +2,6 @@ Flask==1.1.2
 SQLAlchemy==1.4.11
 pg8000==1.19.3 # Do not upgrade >=1.6.6 until https://github.com/tlocke/pg8000/commit/3a2e7439ae3613367ec231218d7e0f541466d1e5#commitcomment-43174891 is resolved
 gunicorn==20.1.0
-firebase-admin==4.5.3
+firebase-admin==5.0.0
 google-cloud-secret-manager==2.4.0
 structlog==21.1.0