Fix typo in types.mdx (brianc#2989)

Author: enahs

docs/pages/features/types.mdx

@@ -21,7 +21,7 @@ console.log(result.rows[0]) // will contain the unparsed string value of each co
 
 ### uuid + json / jsonb
 
-There is no data type in JavaScript for a uuid/guid so node-postgres converts a uuid to a string. JavaScript has great support for JSON and node-postgres converts json/jsonb objects directly into their JavaScript object via [`JSON.parse`](https://github.com/brianc/node-pg-types/blob/master/lib/textParsers.js#L193). Likewise sending an object to the PostgreSQL server via a query from node-postgres, node-posgres will call [`JSON.stringify`](https://github.com/brianc/node-postgres/blob/e5f0e5d36a91a72dda93c74388ac890fa42b3be0/lib/utils.js#L47) on your outbound value, automatically converting it to json for the server.
+There is no data type in JavaScript for a uuid/guid so node-postgres converts a uuid to a string. JavaScript has great support for JSON and node-postgres converts json/jsonb objects directly into their JavaScript object via [`JSON.parse`](https://github.com/brianc/node-pg-types/blob/master/lib/textParsers.js#L193). Likewise sending an object to the PostgreSQL server via a query from node-postgres, node-postgres will call [`JSON.stringify`](https://github.com/brianc/node-postgres/blob/e5f0e5d36a91a72dda93c74388ac890fa42b3be0/lib/utils.js#L47) on your outbound value, automatically converting it to json for the server.
 
 ```js
 const createTableText = `