Selector: Update Sizzle from 2.3.7 to 2.3.8

Fixes gh-5147
Ref gh-5158
Ref jquery/sizzle#490

Author: mgol

external/sizzle/dist/sizzle.js

@@ -1,12 +1,12 @@
 /*!
- * Sizzle CSS Selector Engine v2.3.7
+ * Sizzle CSS Selector Engine v2.3.8
  * https://sizzlejs.com/
  *
  * Copyright JS Foundation and other contributors
  * Released under the MIT license
  * https://js.foundation/
  *
- * Date: 2022-10-03
+ * Date: 2022-11-16
  */
 ( function( window ) {
 var i,
@@ -987,7 +987,14 @@ setDocument = Sizzle.setDocument = function( node ) {
 	// As in, an element does not contain itself
 	contains = hasCompare || rnative.test( docElem.contains ) ?
 		function( a, b ) {
-			var adown = a.nodeType === 9 ? a.documentElement : a,
+
+			// Support: IE <9 only
+			// IE doesn't have `contains` on `document` so we need to check for
+			// `documentElement` presence.
+			// We need to fall back to `a` when `documentElement` is missing
+			// as `ownerDocument` of elements within `<template/>` may have
+			// a null one - a default behavior of all modern browsers.
+			var adown = a.nodeType === 9 && a.documentElement || a,
 				bup = b && b.parentNode;
 			return a === bup || !!( bup && bup.nodeType === 1 && (
 				adown.contains ?