Bump grpcio from 1.73.0 to 1.76.0 in /spark

Bumps [grpcio](https://github.com/grpc/grpc) from 1.73.0 to 1.76.0.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.73.0...v1.76.0)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-version: 1.76.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

spark/requirements.txt

@@ -5,6 +5,6 @@ jupysql==0.11.1
 matplotlib==3.9.4
 scipy==1.14.1
 duckdb-engine==0.17.0
-grpcio==1.73.0
+grpcio==1.76.0
 pycolor==1.2.1
 papermill==2.6.0