chore(deps): update dependency protobuf to v3.19.3 (#1224)
chore(deps): update dependency protobuf to v3.19.3 (#1224)

Co-authored-by: Benjamin E. Coe <69440dae14aaa9fe2429b324bfce03449d09e1db@google.com>
googleapis/synthtool,googleapis/synthtool,googleapis/synthtool,googleapis/synthtool,googleapis/synthtool