[gestalt] Fix SegmentedControlProps

SegmentedControl was pointed at the wrong interface.

types/gestalt/index.d.ts

@@ -1,6 +1,7 @@
 // Type definitions for gestalt 0.75
 // Project: https://github.com/pinterest/gestalt, https://pinterest.github.io/gestalt
 // Definitions by: Nicolás Serrano Arévalo <https://github.com/serranoarevalo>
+//                 Josh Gachnang <https://github.com/joshgachnang>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -938,7 +939,7 @@ export class Pog extends React.Component<PogProps, any> {}
 export class Pulsar extends React.Component<PulsarProps, any> {}
 export class RadioButton extends React.Component<RadioButtonProps, any> {}
 export class SearchField extends React.Component<SearchFieldProps, any> {}
-export class SegmentedControl extends React.Component<SearchFieldProps, any> {}
+export class SegmentedControl extends React.Component<SegmentedControlProps, any> {}
 export class SelectList extends React.Component<SelectListProps, any> {}
 export class Spinner extends React.Component<SpinnerProps, any> {}
 export class Sticky extends React.Component<StickyProps, any> {}