Change "Toggle clock" to "Toggle calendar" in documentation

Author: wojtekmaj

README.md

@@ -94,7 +94,7 @@ Displays an input field complete with custom inputs, native input, and a calenda
 
 |Prop name|Description|Default value|Example values|
 |----|----|----|----|
-|calendarAriaLabel|`aria-label` for the calendar button.|n/a|`"Toggle clock"`|
+|calendarAriaLabel|`aria-label` for the calendar button.|n/a|`"Toggle calendar"`|
 |calendarClassName|Class name(s) that will be added along with "react-calendar" to the main React-Calendar `<div>` element.|n/a|<ul><li>String: `"class1 class2"`</li><li>Array of strings: `["class1", "class2 class3"]`</li></ul>|
 |calendarIcon|Content of the calendar button. Setting the value explicitly to `null` will hide the icon.| (default icon)|<ul><li>String: `"Calendar"`</li><li>React element: `<CalendarIcon />`</li></ul>|
 |className|Class name(s) that will be added along with `"react-date-picker"` to the main React-Date-Picker `<div>` element.|n/a|<ul><li>String: `"class1 class2"`</li><li>Array of strings: `["class1", "class2 class3"]`</li></ul>|