fix(deps): 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

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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))

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[codecov[bot]]

Codecov Report

Merging #76 (ba3d730) into main (153fb4e) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #76   +/-   ##
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  Coverage   56.60%   56.60%           
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  Files          34       34           
  Lines        4489     4489           
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  Hits         2541     2541           
  Misses       1948     1948