doc: add getPopupContainer to README

Author: xrutayisire

README.md

@@ -473,6 +473,14 @@ CronProps {
     altWeekDays?: string[]
     altMonths?: string[]
   }
+
+  /**
+   * Define the container for the dropdowns.
+   * By default, the dropdowns will be rendered in the body.
+   * This is useful when you want to render the dropdowns in a specific
+   * container, for example, when using a modal or a specific layout.
+   */
+  getPopupContainer?: () => HTMLElement
 }
 ```
 

src/types.ts

@@ -225,7 +225,7 @@ export interface CronProps {
    */
   locale?: Locale
 
-  /*
+  /**
    * Define the container for the dropdowns.
    * By default, the dropdowns will be rendered in the body.
    * This is useful when you want to render the dropdowns in a specific