Fix typo

Author: dmzmk

src/ast/mod.rs

@@ -3405,7 +3405,7 @@ pub enum Statement {
         purge: bool,
         /// MySQL-specific "TEMPORARY" keyword
         temporary: bool,
-        /// MySQL-specific drop index syntax, which requires table speficication  
+        /// MySQL-specific drop index syntax, which requires table specification  
         /// See <https://dev.mysql.com/doc/refman/8.4/en/drop-index.html>
         table: Option<ObjectName>,
     },