Format nav-v2 scroll observer

Prettier wrapped the ResizeObserver map type so the npm formatting check passes in CI.

Co-Authored-By: OpenAI GPT-5.4 <noreply@openai.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: 3 people

src/Elastic.Documentation.Site/Assets/pages-nav-v2.ts

@@ -9,7 +9,10 @@ let navV2OptimisticNavigateBound = false
 
 let navV2TruncationTippyInstances: Instance[] = []
 const navV2ActiveBranchScrollTimeouts = new WeakMap<HTMLElement, number[]>()
-const navV2ActiveBranchScrollObservers = new WeakMap<HTMLElement, ResizeObserver>()
+const navV2ActiveBranchScrollObservers = new WeakMap<
+    HTMLElement,
+    ResizeObserver
+>()
 
 function readCollapsedFolderIds(): Set<string> {
     try {