Bump google.golang.org/grpc from 1.33.1 to 1.33.2 in /instrumentation/google.golang.org/grpc/otelgrpc/example (#443)

* Bump google.golang.org/grpc

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.33.1 to 1.33.2.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.33.1...v1.33.2)

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

* Auto-fix go.sum changes in dependent modules

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: dependabot[bot] <dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tyler Yahn <[email protected]>

Author: dependabot[bot]