deps: fix V8 compiler error with clang++-11

Fixes: https://github.com/nodejs/node/issues/33040

  error: type 'antlr4::tree::TerminalNode *' cannot be narrowed to
    'bool' in initializer list [-Wc++11-narrowing]
  ParameterList result{{}, {}, context->VARARGS(), {}};

Occurs twice:
  ../../deps/v8/src/torque/ast-generator.cc:123:32:
  ../../deps/v8/src/torque/ast-generator.cc:144:32:

PR-URL: https://github.com/nodejs/node/pull/33094


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>