doc: Update README.md (#165)

Author: DiegoFleitas

README.md

@@ -54,7 +54,7 @@ Serverless: GraphiQl: http://localhost:20002
 Put options under `custom.appsync-simulator` in your `serverless.yml` file
 
 | option                   | default                    | description                                                                                                                                                                                          |
-| ------------------------ | -------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- |
+| ------------------------ | -------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | apiKey                   | `0123456789`               | When using `API_KEY` as authentication type, the key to authenticate to the endpoint.                                                                                                                |
 | port                     | 20002                      | AppSync operations port; if using multiple APIs, the value of this option will be used as a starting point, and each other API will have a port of lastPort + 10 (e.g. 20002, 20012, 20022, etc.)    |
 | wsPort                   | 20003                      | AppSync subscriptions port; if using multiple APIs, the value of this option will be used as a starting point, and each other API will have a port of lastPort + 10 (e.g. 20003, 20013, 20023, etc.) |
@@ -71,12 +71,13 @@ Put options under `custom.appsync-simulator` in your `serverless.yml` file
 | dynamoDb.\*              |                            | You can add every configuration accepted by [DynamoDB SDK](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB.html#constructor-property)                                               |
 | rds.dbName               |                            | Name of the database                                                                                                                                                                                 |
 | rds.dbHost               |                            | Database host                                                                                                                                                                                        |
-| rds.dbDialect            |                            | Database dialect. Possible values (mysql                                                                                                                                                             | postgres) |
+| rds.dbDialect            |                            | Database dialect. Possible values (mysql/postgres)                                                                                                                                                   |
 | rds.dbUsername           |                            | Database username                                                                                                                                                                                    |
 | rds.dbPassword           |                            | Database password                                                                                                                                                                                    |
 | rds.dbPort               |                            | Database port                                                                                                                                                                                        |
 | watch                    | - \*.graphql<br/> - \*.vtl | Array of glob patterns to watch for hot-reloading.                                                                                                                                                   |
 
+
 Example:
 
 ```yml