fix(docs): Update @astrojs/sitemap readme to clarify build output location

[evadecker]

Changes

• This slightly modifies the language in the docs to clarify that /dist is the default output, but generated files may live elsewhere (a confusion that cost me a silly amount of time trying to debug).
• I considered adding a note that the Vercel adapter will output to .vercel/output and that other adapters may output code to a place other than /dist, but this felt too in-the-weeds. If this is helpful to call out, happy to make edits!
• Resolves @astrojs/sitemap does not always output sitemaps to dist/ docs#4919 (Not sure if Github will auto-close this PR since it's in a separate repo, but the sitemap docs get auto-generated from this README)
• Also pairs with @silent1mezzo's improvements to the CLI text: Added OUTPUT dir to sitemap build command #8824

Testing

Docs-only change.

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[ematipico]

• (Not sure if Github will auto-close this PR since it's in a separate repo, but the sitemap docs get auto-generated from this README)

It seems it will :)

[ematipico]

@withastro/maintainers-docs this is your turf, please review :)

[newtoallofthis123]

lgtm 😄

[sarah11918]

Thank you so much for this helpful restructuring, @evadecker! 🥳

It's a great tweak to the existing sentence to more properly identify the sitemap files. I'd like to work on the ending though, since we don't typically use em-dashes in docs. That probably means either sticking another clause on the end, or using parenthesis to include the extra information of the default output directory.

I left a comment with a suggestion below. See what you think, or if that gives you any better ideas. 🙌

[evadecker]

Thank you so much for this helpful restructuring, @evadecker! 🥳

It's a great tweak to the existing sentence to more properly identify the sitemap files. I'd like to work on the ending though, since we don't typically use em-dashes in docs. That probably means either sticking another clause on the end, or using parenthesis to include the extra information of the default output directory.

I left a comment with a suggestion below. See what you think, or if that gives you any better ideas. 🙌

I respect killing the em dash—I overuse it. :)

Great suggestion @sarah11918, applied!