explicit nvarchar limitation

Author: rhjsy-axt

docs/t-sql/functions/binary-checksum-transact-sql.md

@@ -70,7 +70,7 @@ or
 
 For example, the strings "McCavity" and "Mccavity" have different `BINARY_CHECKSUM` values. In contrast, for a case-insensitive server, `CHECKSUM` returns the same checksum values for those strings. You should avoid comparison of `CHECKSUM` values with `BINARY_CHECKSUM` values.
 
-`BINARY_CHECKSUM` supports any length of type **varbinary(max)** and up to 255 characters of type **nvarchar(max)**.
+`BINARY_CHECKSUM` supports any length of type **varbinary(max)** and up to 255 characters of type **nvarchar(n | max)**.
 
 ## Examples  
 This example uses `BINARY_CHECKSUM` to detect changes in a table row.