fix frontmatter

Author: Blargian

docs/integrations/language-clients/csharp.md

@@ -7,9 +7,9 @@ description: 'The official C# client for connecting to ClickHouse.'
 title: 'ClickHouse C# Driver'
 doc_type: 'guide'
 integration:
-  support_level: 'core'
-  category: 'language_client'
-  website: 'https://github.com/ClickHouse/clickhouse-cs'
+  - support_level: 'core'
+  - category: 'language_client'
+  - website: 'https://github.com/ClickHouse/clickhouse-cs'
 ---
 
 # ClickHouse C# client