build: bump the grpc-deps group with 2 updates

Bumps the grpc-deps group with 2 updates: [grpcio](https://github.com/grpc/grpc) and [grpcio-health-checking](https://grpc.io).


Updates `grpcio` from 1.67.1 to 1.68.0
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.67.1...v1.68.0)

Updates `grpcio-health-checking` from 1.67.1 to 1.68.0

---
updated-dependencies:
- dependency-name: grpcio
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: grpc-deps
- dependency-name: grpcio-health-checking
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: grpc-deps
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -53,8 +53,8 @@ tests = [
     "ansys-tools-visualization-interface==0.6.0",
     "beartype==0.19.0",
     "docker==7.1.0",
-    "grpcio==1.67.1",
-    "grpcio-health-checking==1.67.1",
+    "grpcio==1.68.0",
+    "grpcio-health-checking==1.68.0",
     "numpy==2.1.3",
     "Pint==0.24.4",
     "protobuf==5.28.3",
@@ -81,8 +81,8 @@ doc = [
     "ansys-tools-visualization-interface==0.6.0",
     "beartype==0.19.0",
     "docker==7.1.0",
-    "grpcio==1.67.1",
-    "grpcio-health-checking==1.67.1",
+    "grpcio==1.68.0",
+    "grpcio-health-checking==1.68.0",
     "ipyvtklink==0.2.3",
     "jupyter_sphinx==0.5.3",
     "jupytext==1.16.4",