Fix/forms phone controls error (#45659)

* fix issue with react key prop on field controls

* changelog

* use key prop on parent container

Author: CGastrell

projects/packages/forms/changelog/fix-forms-phone-controls-error

@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Forms: fix an error on phone field controls due to lack of key prop

projects/packages/forms/src/blocks/field-telephone/edit.js

@@ -145,7 +145,7 @@ export default function PhoneFieldEdit( props ) {
 					{
 						index: 1,
 						element: (
-							<>
+							<div key="phoneFieldControls">
 								<ToggleControl
 									label={ __( 'Show country selector', 'jetpack-forms' ) }
 									checked={ showCountrySelector || false }
@@ -162,7 +162,7 @@ export default function PhoneFieldEdit( props ) {
 										__next40pxDefaultSize={ true }
 									/>
 								) }
-							</>
+							</div>
 						),
 					},
 				] }