chore(common): PAYMENTS-10968 Update Payments API postman collection (#1114)

<!-- Ticket number or summary of work -->
#
[PAYMENTS-10968](https://bigcommercecloud.atlassian.net/browse/PAYMENTS-10968)


## What changed?
<!-- Provide a bulleted list in the present tense -->
* Update Run In Postman collection link to a shared collection
accessible by Payments team.
* New Postman collection contains a newly added stored bank account
example

## Release notes draft
<!-- Provide an entry for the release notes using simple, conversational
language. Don't be too technical. Explain how the change will benefit
the merchant and link to the feature.

Examples:
* The newly-released [X feature] is now available to use. Now, you’ll be
able to [perform Y action].
* We're happy to announce [X feature], which can help you [perform Y
action].
* [X feature] helps you to create [Y response] using the [Z query
parameter]. Now, you can deliver [ex, localized shopping experiences for
your customers].
* Fixed a bug in the [X endpoint]. Now the [Y field] will appear when
you click [Z option]. -->

* Updates the Run In Postman collection link to include a stored bank
account example.

## Anything else?
<!-- Add related PRs, salient notes, additional ticket numbers, etc. -->

ping @bigcommerce/team-payments 


[PAYMENTS-10968]:
https://bigcommercecloud.atlassian.net/browse/PAYMENTS-10968?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Author: bc-afeng

docs/store-operations/payments/index.mdx

@@ -17,7 +17,7 @@ Add the [Create Payments scope](/docs/start/authentication/api-accounts#token-cr
 Learn more about BigCommerce API [OAuth scopes](/docs/start/authentication/api-accounts#oauth-scopes).
 </Callout>
 
-[![Run in Postman](https://run.pstmn.io/button.svg)](https://app.getpostman.com/run-collection/38daa68bda00ba9d4734)
+[![Run in Postman](https://run.pstmn.io/button.svg)](https://god.gw.postman.com/run-collection/40447133-f8876e25-33c0-4174-ba8f-7857f336200d)
 
 <Callout type="info">
 #### Implementation note