Add us to DurableObjectJurisdiction type

[KirillTim]

Also fix an outdated documentation link.

[github-actions]

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[KirillTim]

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[ask-bonk]

The extra changes in the snapshot files (like restore, apac-ne, apac-se) are from the merge with main picking up other changes that were already in the source but not yet regenerated in the snapshots. This is expected.

Let me now assess the overall PR:

1. actor.h changes: Adding "us" to the DurableObjectJurisdiction type union and updating the documentation link. Both are clean, correct changes.
2. Generated snapshot files: Properly regenerated. The extra diffs beyond DurableObjectJurisdiction are from the type generator catching up with other source changes (like apac-ne/apac-se location hints and the restore method).
3. Documentation link: The new link https://developers.cloudflare.com/durable-objects/reference/data-location/#restrict-durable-objects-to-a-jurisdiction is valid and correct.

The only potential issue: the Cloudflare docs page currently doesn't list "us" as a supported jurisdiction (only eu and fedramp). But fedramp-high was already in the type before this PR and isn't on the docs page either, suggesting the type definition intentionally includes values beyond what's publicly documented. The PR author (KirillTim) appears to be a Cloudflare employee based on the branch name pattern, so they likely know about internal jurisdiction values.

This is a clean, minimal type-hint addition with no behavioral changes, no security implications, and no backward compatibility concerns (adding a new union member is additive). The generated snapshots were properly regenerated.

LGTM

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