Add note about javascript: URLs being disallowed in Navigation.naviga…

[chrisdavidmills]

…te() calls

Summary

javascript: URLs are no longer allowed in Navigation.navigate() calls (see whatwg/html#11533), and I thought this should be mentioned in BCD, as the state of support for this change differs across browsers:

• Firefox implemented it in Fx144 (https://bugzilla.mozilla.org/show_bug.cgi?id=1981104), but the Navigation API was only enabled in Nightly as of Fx146, so I didn't think a note was needed here. I tested this to verify.
• Chromium browsers still allow it (see https://issues.chromium.org/issues/439994590 for the removal bug), so I thought a note was needed there, so say it is still allowed. I tested this in Chrome Canary, and yup, it still works.
• Safari has fixed it in preview (see https://bugs.webkit.org/show_bug.cgi?id=297650). I tested this to verify. I've not added any Safari data because the whole API says it is not supported in Safari. Obviously, this needs updating, but I think it is out of scope for this PR.

Test results and supporting details

Related issues

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