avro

Bump grpc.version from 1.40.1 to 1.42.1 in /lang/java (#1420)

Bumps `grpc.version` from 1.40.1 to 1.42.1.

Updates `grpc-core` from 1.40.1 to 1.42.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](https://github.com/grpc/grpc-java/compare/v1.40.1...v1.42.1)

Updates `grpc-stub` from 1.40.1 to 1.42.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](https://github.com/grpc/grpc-java/compare/v1.40.1...v1.42.1)

Updates `grpc-netty` from 1.40.1 to 1.42.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](https://github.com/grpc/grpc-java/compare/v1.40.1...v1.42.1)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-stub
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-netty
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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