Fixed Typo and added new section (#3918)

Resolved issue raised here: #3886
1. Corrected "Remove a navigation link" verb.
2. Added section - Handle special characters

Author: nanddeepn

docs/declarative-customization/site-design-json-schema.md

@@ -634,7 +634,7 @@ Use the **removeNavLink** verb to remove a navigation link from the site.
 
 #### JSON values
 
-- **url** – The url of the link to add.
+- **url** – The url of the link to remove.
 - **displayName** – The display name of the link.
 - **isWebRelative** – **True** if the link is web relative; otherwise, **false**.
 
@@ -668,6 +668,13 @@ Use the **removeNavLink** verb to remove a navigation link from the site.
 }
 ```
 
+#### Handle special characters
+The sites created in other languages than English may contain special characters. Use UTF-8 encoding to read the JSON content containing special characters. 
+
+```PowerShell
+Get-Content '<Folder_location_to_site_script>\site-script.json' -Raw -Encoding UTF8
+```
+
 ## Apply a theme
 
 Use the **applyTheme** verb to add a custom theme to the site. For more information about how to construct and upload these themes, see [SharePoint site theming](site-theming/sharepoint-site-theming-overview.md). Note that this site action only works for applying custom themes; to apply one of our in-product SharePoint themes, create a copy as a custom one and reference that one.