message: Update API report to new format
diff: > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
  ```ts
  +/// <reference types="react" />
  import { BackstagePlugin } from '@backstage/core-plugin-api';
  import { RouteRef } from '@backstage/core-plugin-api';
  @@ -11,11 +12,12 @@ import { RouteRef } from '@backstage/core-plugin-api';
  export const XcmetricsPage: () => JSX.Element;
  // @public (undocumented)
  -export const xcmetricsPlugin: BackstagePlugin<{
  +export const xcmetricsPlugin: BackstagePlugin<
  + {
  root: RouteRef<undefined>;
  -}, {}>;
  -
  + },
  + {}
  +>;
  // (No @packageDocumentation comment for this package)
  -
  ```
  