fix(deps): Update dependency grpcio to v1.64.1 (#91)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [grpcio](https://grpc.io) ([source](https://togithub.com/grpc/grpc)) | patch | `==1.64.0` -> `==1.64.1` |

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### Release Notes

<details>
<summary>grpc/grpc (grpcio)</summary>

### [`v1.64.1`](https://togithub.com/grpc/grpc/releases/tag/v1.64.1)

[Compare Source](https://togithub.com/grpc/grpc/compare/v1.64.0...v1.64.1)

This is release 1.64.1 ([grateful](https://togithub.com/grpc/grpc/blob/master/doc/g_stands_for.md)) of gRPC Core.

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, with highlights listed below.

## Core

-   \[StatsPlugin] Fix use-after-free issue ([#&#8203;36664](https://togithub.com/grpc/grpc/issues/36664)). ([#&#8203;36670](https://togithub.com/grpc/grpc/pull/36670))

## C++

-   \[OTel] Generate pkg-config file for grpcpp_otel_plugin ([#&#8203;36686](https://togithub.com/grpc/grpc/issues/36686)). ([#&#8203;36722](https://togithub.com/grpc/grpc/pull/36722))
-   \[OTel] Add find_package call for OTel dependency in installed gRPC configuration ([#&#8203;36674](https://togithub.com/grpc/grpc/issues/36674)). ([#&#8203;36688](https://togithub.com/grpc/grpc/pull/36688))

## Python

-   \[Python Server] Remove abstractmethod notation for add_registered_method_handlers (v1.64.x backport). ([#&#8203;36696](https://togithub.com/grpc/grpc/pull/36696))

</details>

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requirements.txt

@@ -1,6 +1,6 @@
 black==24.4.2
 grpcio-tools==1.64.0
-grpcio==1.64.0
+grpcio==1.64.1
 protobuf==5.27.0
 pyarrow==15.0.2
 pytest==8.2.1