CHORE: Bump grpcio from 1.67.1 to 1.68.0 in the core group

Bumps the core group with 1 update: [grpcio](https://github.com/grpc/grpc).


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)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: core
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -58,7 +58,7 @@ tests = [
 doc = [
     "sphinx==8.1.3",
     "ansys-sphinx-theme[autoapi]==1.2.0",
-    "grpcio==1.67.1",
+    "grpcio==1.68.0",
     "imageio-ffmpeg==0.5.1",
     "imageio==2.36.0",
     "jupyter_sphinx==0.5.3",