[docs-scanner] Inconsistent internal link syntax across billing documentation

[docker-agent]

Files:

• content/manuals/billing/history.md
• content/manuals/billing/payment-method.md

Issue

Multiple files in the billing directory use inconsistent internal link syntax. Some links include the /manuals/ prefix while others reference it without the leading slash:

In history.md:

If you choose to pay using a US bank account, you must verify the account. For
more information, see Verify a bank account.

In payment-method.md:

• To verify your bank account, see
  Verify a bank account.

These should use the leading / format: /manuals/billing/payment-method.md#verify-a-bank-account

Meanwhile, other links in the same files correctly use formats like:

• /billing/details/
• /manuals/billing/cycle.md
• /manuals/billing/history.md

Suggested fix

Standardize all internal links to use the leading / format consistently:

[Verify a bank account](/manuals/billing/payment-method.md#verify-a-bank-account)

Update all instances in both history.md and payment-method.md to match the consistent format used elsewhere in the documentation.

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Found by nightly documentation freshness scanner

[github-actions]

✅ The agent team has created a PR to address this issue. Please review when ready.