doc: use named import and Set for builtinModules
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines
just using named import for good measure, as well as using a Set, to be consistent with:
const JS_EXTENSIONS = new Set(['.js', '.mjs']);