docs: remove outdated info (#1520)

Author: TC-MO

sources/platform/actors/development/actor_definition/input_schema/specification.md

@@ -123,7 +123,7 @@ Each field of your input is described under its key in the `inputSchema.properti
 | `title` | String | Yes | Title of the field in UI. |
 | `description` | String | Yes | Description of the field that will be <br/>displayed as help text in Actor input UI. |
 | `default` | Must match `type` property. | No | Default value that will be <br/>used when no value is provided. |
-| `prefill` | Must match `type` property. | No | Value that will be prefilled <br/>in the Actor input interface. <br/>Only the `boolean` type doesn't <br/>support `prefill` property. |
+| `prefill` | Must match `type` property. | No | Value that will be prefilled <br/>in the Actor input interface. |
 | `example` | Must match `type` property. | No | Sample value of this field <br/>for the Actor to be displayed when <br/>Actor is published in Apify Store. |
 | `sectionCaption` | String | No | If this property is set, <br/>then all fields following this field <br/>(this field included) will be separated <br/>into a collapsible section <br/>with the value set as its caption. <br/>The section ends at the last field <br/>or the next field which has the <br/> `sectionCaption` property set. |
 | `sectionDescription` | String | No | If the `sectionCaption` property is set, <br/>then you can use this property to <br/>provide additional description to the section. <br/>The description will be visible right under <br/>the caption when the section is open. |