[CI] remove doc/release-notes.md from lint-spelling.py

[JeremyRubin]

/doc/release-notes/ is ignored, but during release branch-off, the latest release is copied to doc/release-notes.md. This means that CI runs based off of the branch off point (e.g., for backport dev) will fail CI if there are spelling errors, or if there are e.g. contributors names that resemble spelling errors (not a hypothetical example).

[DrahtBot]

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[l0rinc]

The release notes is kinda' important to check for spelling errors - could we maybe add the exceptional contributor names to https://github.com/bitcoin/bitcoin/blob/master/test/lint/spelling.ignore-words.txt instead?

[JeremyRubin]

I think it's a separate issue -- since it seems that the release (e.g., non code doc changes pre-release) is maybe not getting run through CI anyways, or else this would have been caught?

[maflcko]

(not a hypothetical example).

I tried searching for a real example in the past, but I couldn't find one: https://github.com/bitcoin/bitcoin/pulls?q=%22LLM+reason+%28%E2%9C%A8+experimental%29%22+sort%3Aupdated-desc+is%3Apr+draft%3Afalse+label%3ABackport+is%3Aclosed+

Not sure how much value there is in codespell at this point, given the LLM typo linter, so codespell could even be removed fully. It also seems fine to keep as-is and deal with true and false positives in the backport pull request, when there is need.

Also, seems fine to exclude it, like here. No strong opinion, but lgtm ACK 6494713

[l0rinc]

so codespell could even be removed fully

It does seem to cause more problems than it's solving, I'd vote for that instead

[maflcko]

will fail CI if there are spelling errors

I don't think this is true either. The comment in the file literally says:

Note: Will exit successfully regardless of spelling errors.