:arrow_up: Update dependency grpcio to v1.56.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
grpcio (source)	==1.56.0 -> ==1.56.2

---

Release Notes

grpc/grpc (grpcio)

### [`v1.56.2`](https://togithub.com/grpc/grpc/releases/tag/v1.56.2) [Compare Source](https://togithub.com/grpc/grpc/compare/v1.56.0...v1.56.2) This is release gRPC Core 1.56.2 (galvanized). For gRPC documentation, see [grpc.io](https://grpc.io/). For previous releases, see [Releases](https://togithub.com/grpc/grpc/releases). This release contains refinements, improvements, and bug fixes. ## Core - \[WRR] backport ([#​33694](https://togithub.com/grpc/grpc/pull/33694)) to 1.56 ([#​33698](https://togithub.com/grpc/grpc/pull/33698)) - \[backport]\[iomgr]\[EventEngine] Improve server handling of file descriptor exhaustion ([#​33667](https://togithub.com/grpc/grpc/pull/33667))

---

Configuration

📅 Schedule: Branch creation - "after 5pm every weekday,every weekend,before 9am every weekday" in timezone America/Los_Angeles, Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, 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 has been generated by Mend Renovate. View repository job log here.