Update typo in realtime_updates.py

[matthieuEv]

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Description of Changes

missing a "s" for "admins" in:
await pb.admins.auth.with_password(email=ADMIN_EMAIL, password=ADMIN_PASSWORD)

causing the error:

   await pb.admin.auth.with_password(email=ADMIN_EMAIL, password=ADMIN_PASSWORD)
          ^^^^^^^^
AttributeError: 'PocketBase' object has no attribute 'admin'. Did you mean: 'admins'?

Related Issues

None

[thijsmie]

Thank you for the fix! I need to get a test of the examples going...