chore: add build flag for change log (#1792)

packages/env/src/index.ts

@@ -111,6 +111,7 @@ export const publicRuntimeConfigSchema = z.object({
   // expose internal api to globalThis, **development only**
   exposeInternal: z.boolean(),
   enableSubpage: z.boolean(),
+  enableChangeLog: z.boolean(),
 });
 
 export type PublicRuntimeConfig = z.infer<typeof publicRuntimeConfigSchema>;