False positive with `svelte/no-navigation-without-resolve` when `href` is `null` or `undefined`

[Stadly]

Before You File a Bug Report Please Confirm You Have Done The Following...

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.

What version of ESLint are you using?

9.34.0

What version of eslint-plugin-svelte are you using?

3.12.2

What did you do?

Updated to eslint-plugin-svelte v3.12

<a href={undefined}>test</a>
<a href={null}>test</a>

What did you expect to happen?

href can be null or undefined:

svelte/no-navigation-without-resolve should not require null or undefined to be resolved.

What actually happened?

error Found a link with a url that isn't resolved svelte/no-navigation-without-resolve

Link to GitHub Repo with Minimal Reproducible Example

I'll provide one if needed.

Additional comments

No response