[Tooling] Update the Xcode image from 16.1 RC to 16.1

[spencertransier]

To test: This is good to go if CI is green. The 16.1-rc.1 and 16.1 images are the exact same besides the name because the Xcode 16.1 final build was the same as the RC.

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 25.5. The due date for this milestone has already passed. Please assign it to a milestone with a later deadline or check whether the release for this milestone has already been finished.

Generated by 🚫 Danger

[wpmobilebot]

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

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr23733-363a1ca
	Version	25.4.1
	Bundle ID	org.wordpress.alpha
	Commit	363a1ca
	App Center Build	WPiOS - One-Offs #10912

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[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	pr23733-363a1ca
	Version	25.4.1
	Bundle ID	com.jetpack.alpha
	Commit	363a1ca
	App Center Build	jetpack-installable-builds #9952

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[mokagio]

Too easy 😄