docs: fix TiDB Cloud Premium index IAM anchors

[doc-claw-bot]

What is changed, added or deleted? (Required)

• Fix malformed manage-user-access anchor links in tidb-cloud/premium/_index.md.
• Remove the extra / before the fragment so the Premium links keep plan=premium instead of plan=premium/.

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• v8.5 (TiDB 8.5 versions)
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• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)

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

• This PR is translated from:
• Other reference link(s): tidb-cloud/premium/_index.md

AI agent involvement

• The changes in this PR were primarily made by an AI agent on behalf of the PR author.

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

Summary by CodeRabbit

• Documentation
  • Corrected TiDB Cloud Premium, Essential, and Starter documentation links.
  • Fixed Security and Billing links for User Roles, Manage User Profiles, Invoices, Credits, and related sections.
  • Updated link formatting so query parameters and section anchors navigate correctly to the intended content.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 17402657-5fe0-4e5f-acb9-64dee16b79d9

📥 Commits

Reviewing files that changed from the base of the PR and between 8706ba2 and 233f1b5.

📒 Files selected for processing (3)

• tidb-cloud/essential/_index.md
• tidb-cloud/premium/_index.md
• tidb-cloud/starter/_index.md

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📝 Walkthrough

Walkthrough

The documentation indexes for the Essential, Premium, and Starter plans update Security and Billing links. The changes correct query-parameter ordering and remove extra slashes before URL fragments.

Changes

TiDB Cloud plan documentation links

Layer / File(s)	Summary
Essential plan link corrections tidb-cloud/essential/_index.md	Places plan=essential before section anchors in User Roles, Manage User Profiles, Invoices, and Credits links.
Premium plan link corrections tidb-cloud/premium/_index.md	Removes extra slashes before fragments in Security and Billing links.
Starter plan link corrections tidb-cloud/starter/_index.md	Places plan=starter before section anchors in Security and Billing links.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Suggested reviewers: lilin90, qiancai

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the Premium index IAM anchor fix, which is a primary part of the documented changes.
Description check	✅ Passed	The description includes the required change, version, reference, AI, and impact sections, but it omits the Essential and Starter link updates.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 5a471376-f4ec-4d16-8994-5cb204bcf630

📥 Commits

Reviewing files that changed from the base of the PR and between 2e1cff6 and 8706ba2.

📒 Files selected for processing (1)

• tidb-cloud/premium/_index.md

[qiancai]

/approve

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-07-31 10:03:28.509249334 +0000 UTC m=+2176794.545344390: ☑️ agreed by qiancai.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qiancai

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