Added "fakeflag" feature flag to fix types

Author: allouis

apps/admin-x-activitypub/src/lib/feature-flags.tsx

@@ -2,7 +2,7 @@ import React, {createContext, useContext, useEffect, useState} from 'react';
 import {useLocation} from '@tryghost/admin-x-framework';
 
 // Define all available feature flags here
-export const FEATURE_FLAGS = [] as const;
+export const FEATURE_FLAGS = ['fakeflag'] as const;
 
 // ---
 export type FeatureFlag = typeof FEATURE_FLAGS[number];