refactor react-router -> react-router-dom

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

plugins/techdocs/src/home/components/TechDocsIndexPage.test.tsx

@@ -16,7 +16,7 @@
 
 import React from 'react';
 import { renderInTestApp } from '@backstage/test-utils';
-import { useOutlet } from 'react-router';
+import { useOutlet } from 'react-router-dom';
 import { TechDocsIndexPage } from './TechDocsIndexPage';
 
 jest.mock('react-router', () => ({

plugins/techdocs/src/home/components/TechDocsIndexPage.tsx

@@ -15,7 +15,7 @@
  */
 
 import React from 'react';
-import { useOutlet } from 'react-router';
+import { useOutlet } from 'react-router-dom';
 import { TableColumn, TableProps } from '@backstage/core-components';
 import { UserListFilterKind } from '@backstage/plugin-catalog-react';
 import { DefaultTechDocsHome } from './DefaultTechDocsHome';

plugins/techdocs/src/search/components/TechDocsSearch.tsx

@@ -23,7 +23,7 @@ import {
 } from '@backstage/plugin-search-react';
 import { makeStyles, Paper } from '@material-ui/core';
 import React, { useEffect, useState } from 'react';
-import { useNavigate } from 'react-router';
+import { useNavigate } from 'react-router-dom';
 import { TechDocsSearchResultListItem } from './TechDocsSearchResultListItem';
 
 const useStyles = makeStyles(theme => ({