message: add supported htmlFor prop to FormGroupLabelProps type definition
diff: @@ -238,7 +238,9 @@ declare module '@primer/components' {
  export interface FormGroupProps extends CommonProps, Omit<React.HTMLAttributes<HTMLDivElement>, 'color'> {}
  - export interface FormGroupLabelProps extends CommonProps, TypographyProps, Omit<React.HTMLAttributes<HTMLLabelElement>, 'color'> {}
  + export interface FormGroupLabelProps extends CommonProps, TypographyProps, Omit<React.HTMLAttributes<HTMLLabelElement>, 'color'> {
  + htmlFor?: string
  + }
  export const FormGroup: React.FunctionComponent<FormGroupProps> & {
  Label: React.FunctionComponent<FormGroupLabelProps>
  