fix(openapi): Fix broken pages in mintlify (v2)

v2 mintlify docs have several broken pages and some endpoints are missing.
<think>
PR Context:
- Title: fix(openapi): Fix broken mintlify pages (v2)
- Merged: 2025-06-20T13:54:03Z
- Files changed: 18 files
- Commits: 4 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [x] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [x] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Fixed the following mintlify pages:

- `v2/customers/customers--update.mdx`
- `payment-method-session--confirm-a-payment-method-session.mdx`
- `payment-method-session--delete-a-saved-payment-method.mdx`
- `payment-method-session--list-pay
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** fix(openapi): Fix broken mintlify pages (v2) (#8382)
Co-authored-by: hyperswitch-bot[bot] <148525504
Files to modify:


**crates/openapi/src/routes/payments.rs**
  Modify existing code

**crates/openapi/src/routes/tokenization.rs**
  Modify existing code
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