fix(i18n): incorrect validation

[ematipico]

Changes

Closes #13551

After 5.6.0, where we changed how we validate the astro configuration, we found out that Astro was validating incorrect values for `i18n.routing.

This PR fixes the values.

Testing

Updated tests and error message.

Docs

cc @delucis and @HiDeoo

[changeset-bot]

🦋 Changeset detected

Latest commit: ceff5f2

The changes in this PR will be included in the next version bump.

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[pkg-pr-new]

astro

npm i https://pkg.pr.new/astro@13552

@astrojs/cloudflare

npm i https://pkg.pr.new/@astrojs/cloudflare@13552

@astrojs/netlify

npm i https://pkg.pr.new/@astrojs/netlify@13552

@astrojs/node

npm i https://pkg.pr.new/@astrojs/node@13552

@astrojs/vercel

npm i https://pkg.pr.new/@astrojs/vercel@13552

commit: 8c1bc76

[delucis]

Thanks for the quick response @ematipico!

[codspeed-hq]

CodSpeed Performance Report

Merging #13552 will not alter performance

_{Comparing fix/incorrect-i18n-validation (ceff5f2) with main (3323f5c)}

Summary

✅ 6 untouched benchmarks

[delucis]

Thanks for the explanation. Makes sense. Left one more thing to consider in case we’d risk breaking things for anyone.