[Atlas] Typo in Docs for Deleting Interface Endpoints in AWS PrivateLink

Description

https://docs.atlas.mongodb.com/reference/api/private-endpoint-delete-one-interface-endpoint/#delete-one-interface-endpoint

the API endpoint should have "interfaceEndpoints" with an "s" instead of just "interfaceEndpoint"

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)