Correct a bank-account test to close account

[itsjustaaron]

The test that checks "close already closed account throws error" does not currently try to close the account twice. Adding in account.close() before the expect() should fix this.

[github-actions]

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Note: If this PR has been pre-approved, please link back to this PR on the forum thread and a maintainer or staff member will reopen it.

[SleeplessByte]

As you know from the forum post, we're discussing how to resolve this.

I did want to re-open this to show you that we currently have CI running on each exercise, on each test. If a test is changed, almost always the "proof" also needs to be updated.

The proof lives here: https://github.com/exercism/javascript/blob/main/exercises/practice/bank-account/.meta/proof.ci.js

If we're changing the test to only throw on the "second" close, then we must update the solution to be "open by default", which may or may not be what we want to do, depending on the outcome of the forum post.