Typo fix in comment (facebook#17111)

Author: DenrizSusam

packages/react-dom/src/client/ReactDOMComponentTree.js

@@ -34,7 +34,7 @@ export function markContainerAsRoot(hostRoot, node) {
 // If the target node is part of a hydrated or not yet rendered subtree, then
 // this may also return a SuspenseComponent or HostRoot to indicate that.
 // Conceptually the HostRoot fiber is a child of the Container node. So if you
-// pass the Container node as the targetNode, you wiill not actually get the
+// pass the Container node as the targetNode, you will not actually get the
 // HostRoot back. To get to the HostRoot, you need to pass a child of it.
 // The same thing applies to Suspense boundaries.
 export function getClosestInstanceFromNode(targetNode) {