chore(deps): bump google.golang.org/grpc from 1.38.0 to 1.48.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.38.0 to 1.48.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.38.0...v1.48.0)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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