Save new values even if options is nil

[crazytonyli]

Description

We store "is XMLRPC disabled" value to Blog.options, which may get lost if the options is nil or empty.

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 26.7. This milestone is due in less than 4 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

Generated by 🚫 Danger

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	App Name	WordPress
	Configuration	Release-Alpha
	Build Number	31005
	Version	PR #25266
	Bundle ID	org.wordpress.alpha
	Commit	6317fc4
	Installation URL	69apoabbodan0

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

	App Name	Jetpack
	Configuration	Release-Alpha
	Build Number	31005
	Version	PR #25266
	Bundle ID	com.jetpack.alpha
	Commit	6317fc4
	Installation URL	169l38dpoi69g

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[wpmobilebot]

🤖 Build Failure Analysis

This build has failures. Claude has analyzed them - check the build annotations for details.

[kean]

I also noticed it today in my work and Claude flagged it. The changes seems reasonable, but I'm not quite sure if its' a bug or intended.

[crazytonyli]

@kean I had looked and traced the changes to #14169. I think it'd be okay to allow updating nil options.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud