Fix Easter typos

[hugovk]

Summary of changes

Easter is a proper noun.

Fixes https://dateutil.readthedocs.io/en/stable/easter.html

Pull Request Checklist

• [n/a] Changes have tests
• Authors have been added to AUTHORS.md
• [n/a] News fragment added in changelog.d. See CONTRIBUTING.md for details

[pganssle]

@hugovk Can you rebase against master? I merged a PR adding GHA like the same minute you opened this PR.

[hugovk]

Yes, will include a fix for the numbered list formatting:

[ffe4]

Not sure I like this look better. Also, aren't these numbers supposed to represent the corresponding constant values, instead of just a numbered listing?

If not we could just omit the numbering, unless there are some conventions about this.

[hugovk]

That's the old look: https://dateutil.readthedocs.io/en/stable/easter.html

The new look will be more like:

[ffe4]

Sorry, I did just quickly copy-paste your code instead of pulling it via git and made a mistake. Your screenshot is correct.

[pganssle]

@ffe4 I think it might be a coincidence that the numbering happens to match the values. We could maybe rearrange things to use non-numbered bullets, or to have non-numbered bullet points that mention the constant directly, but for the purposes of this minor PR we can keep it as is and just fix the numbering.

[pganssle]

Appveyor status reporting is currently not working and there appears to be very little I can do about it, but the actual build is passing so I'm going to go ahead and merge.

I guess we can skip the news on this as it's pretty trivial.