[FreDialog] Add focus ring to the x-links inside the FreDialog

Fixed: 406545705
Change-Id: I7e9515f186b5dbe53c8f7d09d28386c1a4a19f91
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6438859
Reviewed-by: Kim-Anh Tran <[email protected]>
Commit-Queue: Ergün Erdoğmuş <[email protected]>

Author: ergunsh

front_end/panels/ai_assistance/PatchWidget.ts

@@ -548,7 +548,7 @@ export class PatchWidget extends UI.Widget.Widget {
           // clang-format off
           content: html`<x-link
             href=${CODE_SNIPPET_WARNING_URL}
-            class="link"
+            class="link devtools-link"
             jslog=${VisualLogging.link('code-snippets-explainer.patch-widget').track({
               click: true
             })}