Incorrect scrollIntoView options in adjustment-followed-by-scrollBy.html

The test passes with or without the change, but normally scrollIntoView only takes one argument

Differential Revision: https://phabricator.services.mozilla.com/D216449

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1907647
gecko-commit: ec2e67e645c32711c025d2a629d0e1635c0ba23b
gecko-reviewers: hiro

css/css-scroll-anchoring/adjustment-followed-by-scrollBy.html

@@ -29,7 +29,7 @@
   assert_equals(window.scrollY, 0);
 
   // Center an element.
-  center.scrollIntoView({ block: "center" }, { behavior: "instant" });
+  center.scrollIntoView({ block: "center", behavior: "instant" });
   await new Promise(resolve => window.addEventListener("scroll", resolve));
 
   const originalPosition = center.getBoundingClientRect().top;
@@ -50,7 +50,7 @@
 
   // Now try to scrollIntoView({ block: "center" }) and make sure the position
   // is unchanged.
-  center.scrollIntoView({ block: "center" }, { behavior: "instant" });
+  center.scrollIntoView({ block: "center", behavior: "instant" });
 
   // Wait two frames to be able to scroll if it's possible.
   await new Promise(resolve => requestAnimationFrame(resolve));