fix: bug in path for fetch gateway token (#590)

path is duplicating the base `/api/v1` 🤦‍♀️

Author: kathmbeck

go/plumbing/operations/get_a_i_gateway_token_responses.go

@@ -3144,7 +3144,7 @@ paths:
  $ref: '#/definitions/providerDefinition'
  default:
  $ref: '#/responses/error'
- /api/v1/sites/{site_id}/ai-gateway/token:
+ /sites/{site_id}/ai-gateway/token:
  parameters:
  - name: site_id
  type: string