WebInspectorUI: Port missed one to replace CSS method 'matches' with 'is'

[GTK][WPE] Remote Web Inspector: replace deprecated CSS method 'matches' with 'is'
https://bugs.webkit.org/show_bug.cgi?id=253180

Reviewed by Tim Nguyen.

The :matches() selector was renamed to :is() in:
w3c/csswg-drafts#3258

:matches() is no longer supported by some browsers (like Chromium and
Firefox) and breaks Web Inspector UI in such browsers when we connect
via HTTP.

In case GTK/WPE WebKit, we use HTTP version of the inspector and it
can be used from any browser.

Author: nmuthu973

Source/WebInspectorUI/Tools/Images/index.js

@@ -76,7 +76,7 @@ async function parseSVG(path) {
 
     let imgs = [];
     if (!path.includes("#")) {
-        let variants = dom.querySelectorAll(":root > :matches(svg, g)[id]");
+        let variants = dom.querySelectorAll(":root > :is(svg, g)[id]");
         if (variants.length) {
             for (let variant of variants) {
                 let target = variant.getAttribute("id");