docs: fix repl login

[xyzqm]

Fixes #9459

I believe the issue was other messages being sent to the repl prematurely, before the login completed (in my case, the messages were being spammed by React DevTools)

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[xyzqm]

hm, not sure why all these workflows are failing... (oh oops, I guess this is a known issue)

[xyzqm]

@PuruVJ would you mind taking a look?

[xyzqm]

bump?

[PuruVJ]

Thanks for the PR! AFAIK, the only way to test this change out is to merge and see whether it fixed it. Did you test it out locally on your own? Did it work?

[xyzqm]

Yep, it worked locally for me :)

[PuruVJ]

Thanks!