fix(deps): Update dependency grpcio-tools to v1.68.0 (#257)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [grpcio-tools](https://grpc.io) | minor | `==1.67.1` -> `==1.68.0` |

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Author: cq-bot

setup.py

@@ -14,7 +14,7 @@
     "exceptiongroup==1.2.2",
     "black==24.10.0",
     "grpcio==1.68.0",
-    "grpcio-tools==1.67.1",
+    "grpcio-tools==1.68.0",
     "iniconfig==2.0.0",
     "Jinja2==3.1.4",
     "MarkupSafe==3.0.2",