Fix a copy-paste issue in the unit tests

[mokagio]

Stumbled upon this one while working on #22690 . Apologies for missing it during code review.

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Regression Notes

1. Potential unintended areas of impact – N.A.
2. What I did to test those areas of impact (or what existing automated tests I relied on) – N.A.
3. What automated tests I added (or what prevented me from doing so) – N.A.

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PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes. N.A.
• I have considered adding accessibility improvements for my changes. N.A.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary. N.A.

UI changes testing checklist: Not a UI PR.

[wpmobilebot]

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	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr22692-b3a3cb3
	Version	24.3
	Bundle ID	org.wordpress.alpha
	Commit	b3a3cb3
	App Center Build	WPiOS - One-Offs #8943

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[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr22692-b3a3cb3
	Version	24.3
	Bundle ID	com.jetpack.alpha
	Commit	b3a3cb3
	App Center Build	jetpack-installable-builds #7973

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[crazytonyli]

🙈