Coincidental lint warnings are occasionally thrown on these generated files (e.g. in D11120). This diff ignores package-lock.json files when running the spelling linter.

These files are generated, but cannot have comments in them, so can't just mark them as generated to otherwise ignore.

arc lint and ensure package-lock.json files are not scanned. One way to do it is to arc patch 11120, arc lint, observe errors, make this change, arc lint again, observe no errors.