doc: remove superfluous filenaming convention
It is debatable whether "it is considered good style" in Node.js to use hypens or underscores to separate words in file names. Node.js has little to say about that. Remove that material as it is superfluous.
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines