Flaky jest test in spec/frontend/ide/components/repo_editor_spec.js

Job #576837959 failed for a6fc61a1:

 FAIL spec/frontend/ide/components/repo_editor_spec.js
   ● RepoEditor › onPaste › adds a markdown image tag to the file's contents
     expect(received).toBe(expected) // Object.is equality
     - Expected
     + Received
       hello world
     - ![foo.png](./foo.png)
     + 
       564 | 
       565 |       return waitForPromises().then(() => {
     > 566 |         expect(vm.file.content).toBe('hello world\n![foo.png](./foo.png)');
           |                                 ^
       567 |       });
       568 |     });
       569 | 
       at toBe (spec/frontend/ide/components/repo_editor_spec.js:566:33)
 Test Suites: 1 failed, 1 skipped, 839 passed, 840 of 841 total
 Tests:       1 failed, 53 skipped, 8694 passed, 8748 total
 Snapshots:   176 passed, 176 total
 Time:        412.401s
 Ran all test suites.

Passed on retry: https://gitlab.com/gitlab-org/gitlab/-/jobs/577015893