DOC-14091 attribute

Author: RichardSmedley

antora.yml

@@ -13,6 +13,7 @@ asciidoc:
     version-server: '8.0'
     version-common: '8.0.1'
     name_platform: '.NET'
+    name_platform_lc: 'dotnet'
     name-sdk: '.NET SDK'
     sdk_api: '3.9'
     sdk-api-link: https://docs.couchbase.com/sdk-api/couchbase-net-client/