Clarification on gRPC Code Generation

The Zeebe Gateway Protocol (API) as published https://github.com/zeebe-io/zeebe/blob/master/gateway-protocol/src/main/proto/gateway.proto
is licensed under the Zeebe Community License 1.1. Using gRPC tooling to
generate stubs for the protocol does not constitute creating a derivative work
under the Zeebe Community License 1.1 and no licensing restrictions are imposed
on the resulting stub code by the Zeebe Community License 1.1.
