Update nsql openapi title (spiceai#5403)

* Update nsql openapi title

* Update crates/runtime/src/http/v1/nsql.rs

Co-authored-by: Luke Kim <80174+lukekim@users.noreply.github.com>

---------

Co-authored-by: Luke Kim <80174+lukekim@users.noreply.github.com>

Author: ewgenius

crates/runtime/src/http/v1/nsql.rs

@@ -135,9 +135,9 @@ fn return_sql_only(accept: Option<&TypedHeader<Accept>>) -> bool {
     accept.is_some_and(|a| accept_header_types(a).contains(&"application/sql".to_string()))
 }
 
-/// Text to SQL
+/// Text-to-SQL (NSQL)
 ///
-/// Generate and optionally execute an NSQL query.
+/// Generate and optionally execute a natural-language text-to-SQL (NSQL) query.
 ///
 /// This endpoint generates a SQL query using a natural language query (NSQL) and optionally executes it.
 /// The SQL query is generated by the specified model and executed if the `Accept` header is not set to `application/sql`.