Issue-377: [update] removed trailing slash (#501)

<!-- Ticket number or summary of work -->
# [Issue-377](#377)


## What changed?
Removed trailing slash from example


## Release notes draft

N/A - Bug Fix

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

ping {names}

reference/storefront_tokens.v3.yml

@@ -66,7 +66,7 @@ paths:
                 - $ref: '#/components/schemas/TokenPostImpersonation'
             example:
               allowed_cors_origins:
-                -  'https://www.yourstorefront.com/'
+                -  'https://www.yourstorefront.com'
               channel_id: 1
               expires_at: 1885635176
         required: false