correct script return type

Author: sanfilip

lib/scripts/text.js

@@ -10,7 +10,7 @@ var assign = require('lodash.assign');
  * @param {object} params - Script text parameters
  * @param {string} params.scriptId - Id of the script to get text for
  * @param {function} cb - Node-style error-first callback function
- * @returns {object} script - The script JSON object
+ * @returns {string} script - The script JSON object
  * @example
  * paperspace.scripts.text({
  *   scriptId: 'sc123abc',