fix(deps): update dependency google-auth to v2.38.0

This MR contains the following updates:

Package	Type	Update	Change
google-auth	dependencies	minor	2.37.0 -> 2.38.0

---

Release Notes

googleapis/google-auth-library-python (google-auth)

v2.38.0

Compare Source

Features

• Adding domain-wide delegation flow in impersonated credential (#​1624) (34ee3fe)

Documentation

• Add warnings regarding consuming externally sourced credentials (d049370)

---

Configuration

📅 Schedule: Branch creation - "* * * * 1-5" in timezone Europe/London, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

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

---

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

---

This MR has been generated by Renovate Bot.