Update supported AWS regions for full-text search

[guangleibao]

Update supported AWS regions for full-text search as per the planned release-notes of 2026-06-09.

First-time contributors' checklist

• I've signed the Contributor License Agreement, which is required for the repository owners to accept my contribution.

What is changed, added or deleted? (Required)

Which TiDB version(s) do your changes apply to? (Required)

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions.

• master (the latest development version)
• v9.0 (TiDB 9.0 versions)
• v8.5 (TiDB 8.5 versions)
• v8.1 (TiDB 8.1 versions)
• v7.5 (TiDB 7.5 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)
• v6.1 (TiDB 6.1 versions)

What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s):

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign tangenta for approval. For more information see the Code Review Process.
Please ensure that each of them provides their approval before proceeding.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[gemini-code-assist]

Code Review

This pull request adds N.Virginia (us-east-1) to the list of supported AWS regions for full-text search. The review feedback suggests adding a space after the abbreviation period in "N. Virginia" to improve readability and maintain consistency with standard AWS region naming.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.

[gemini-code-assist]

Add a space after the abbreviation period in "N. Virginia" for better readability and consistency with standard AWS region naming.

Suggested change

	- AWS: `Oregon (us-west-2)`, `N.Virginia (us-east-1)`, `Tokyo (ap-northeast-1)`, `Frankfurt (eu-central-1)`, and `Singapore (ap-southeast-1)`
	- AWS: `Oregon (us-west-2)`, `N. Virginia (us-east-1)`, `Tokyo (ap-northeast-1)`, `Frankfurt (eu-central-1)`, and `Singapore (ap-southeast-1)`

References

1. Correct English grammar, spelling, and punctuation mistakes, if any. ^(link)