docs(catalog): CATALOG-11579 Incorrect max limit validation for brand url in CP UI (#1239)

<!-- Ticket number or summary of work -->
# [CATALOG-11579]


## What changed?

* Updated information about brand url validation to comply with actual
behaviour

## Release notes draft


Examples:
* Updated information about brand url validation to comply with actual
behaviour



## Anything else?
<img width="1383" height="447" alt="Screenshot 2026-01-20 at 12 30 24"
src="https://github.com/user-attachments/assets/c3cc1636-d77d-4b41-8833-641309770826"
/>





[CATALOG-11579]:
https://bigcommercecloud.atlassian.net/browse/CATALOG-11579?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Author: olysenko

docs/storefront/stencil/themes/context/object-reference/schemas/brand.yml

@@ -53,4 +53,7 @@ properties:
       type: object
   url:
     type: string
-    description: URL of the brand page
+    description: URL of the brand page. Only letters, numbers, dots (.), dashes (-), underscores (_), and forward slashes (/) are allowed. Must be 1-1024 characters, consisting of segments divided by "/". Each segment must be 1-256 characters.
+    minLength: 1
+    maxLength: 1024
+    pattern: ^(\/([A-Za-z0-9\-_.]{1,256}))*\/?$

reference/catalog/brands_catalog.v3.yml

@@ -346,10 +346,11 @@ paths:
                     url:
                       type: string
                       description: |
-                        Brand URL on the storefront.
+                        Brand URL on the storefront. Only letters, numbers, dots (.), dashes (-), underscores (_), and forward slashes (/) are allowed. Must be 1-1024 characters, consisting of segments divided by "/". Each segment must be 1-256 characters.
                       example: /shoes
                       minLength: 1
-                      maxLength: 255
+                      maxLength: 1024
+                      pattern: ^(\/([A-Za-z0-9\-_.]{1,256}))*\/?$
                       x-url: true
                     is_customized:
                       type: boolean
@@ -428,7 +429,7 @@ paths:
                           url:
                             type: string
                             description: |
-                              Brand URL on the storefront.
+                              Brand URL on the storefront. Must be 1-1024 characters, consisting of segments divided by "/". Each segment must be 1-256 characters.
                             example: /shoes
                             x-url: true
                           is_customized:
@@ -687,10 +688,11 @@ paths:
                     url:
                       type: string
                       description: |
-                        Brand URL on the storefront.
+                        Brand URL on the storefront. Only letters, numbers, dots (.), dashes (-), underscores (_), and forward slashes (/) are allowed. Must be 1-1024 characters, consisting of segments divided by "/". Each segment must be 1-256 characters.
                       example: /shoes
                       minLength: 1
-                      maxLength: 255
+                      maxLength: 1024
+                      pattern: ^(\/([A-Za-z0-9\-_.]{1,256}))*\/?$
                       x-url: true
                     is_customized:
                       type: boolean
@@ -774,7 +776,7 @@ paths:
                           url:
                             type: string
                             description: |
-                              Brand URL on the storefront.
+                              Brand URL on the storefront. Must be 1-1024 characters, consisting of segments divided by "/". Each segment must be 1-256 characters.
                             example: /shoes
                             x-url: true
                           is_customized:
@@ -1783,8 +1785,8 @@ components:
       type: object
       properties:
         url:
-          maxLength: 255
-          minLength: 0
+          maxLength: 1024
+          minLength: 1
           type: string
           description: |
             Product URL on the storefront.