core-compat-api: update api report + fix

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/core-compat-api/api-report.md

@@ -6,11 +6,18 @@
 /// <reference types="react" />
 
 import { BackstagePlugin } from '@backstage/frontend-plugin-api';
+import { ExtensionOverrides } from '@backstage/frontend-plugin-api';
+import { default as React_2 } from 'react';
 
 // @public (undocumented)
 export function collectLegacyRoutes(
   flatRoutesElement: JSX.Element,
 ): BackstagePlugin[];
 
+// @public (undocumented)
+export function convertLegacyApp(
+  rootElement: React_2.JSX.Element,
+): (ExtensionOverrides | BackstagePlugin)[];
+
 // (No @packageDocumentation comment for this package)
 ```

packages/core-compat-api/src/convertLegacyApp.ts

@@ -58,6 +58,7 @@ function selectChildren(
   });
 }
 
+/** @public */
 export function convertLegacyApp(
   rootElement: React.JSX.Element,
 ): (ExtensionOverrides | BackstagePlugin)[] {