README.md in embulk-input-sqlserver-0.8.3 vs README.md in embulk-input-sqlserver-0.8.4

- old
+ new

@@ -19,9 +19,10 @@
 ```
 - **user**: database login user name (string, required if not using integrated authentication)
 - **password**: database login password (string, default: "")
 - **instance**: destination instance name. if instance is set, port option will be ignored (string, default: use the default instance)
 - **database**: destination database name (string, default: use the default database)
+- **schema**: destination schema name (string, optional)
 - **url**: URL of the JDBC connection (string, optional)
 - If you write SQL directly,
   - **query**: SQL to run (string)
 - If **query** is not set,
   - **table**: destination table name (string, required)