message: Update description in protobuf to match tensorflow.ValidateOpDef.
diff: @@ -14,7 +14,7 @@ import "tensorflow/core/framework/types.proto";
  // LINT.IfChange
  message OpDef {
  // Op names starting with an underscore are reserved for internal use.
  - // Names should be CamelCase and match the regexp "[A-Z][a-zA-Z0-9_]*".
  + // Names should be CamelCase and match the regexp "[A-Z][a-zA-Z0-9]*".
  string name = 1;
  // For describing inputs and outputs.
  