chore: fix TrustedTypes policy in `chrome://accessibility` (#38179)

chore: fix TrustedTypes policy in chrome://accessibility

shell/browser/ui/webui/accessibility_ui.cc

@@ -321,6 +321,10 @@ ElectronAccessibilityUI::ElectronAccessibilityUI(content::WebUI* web_ui)
       base::BindRepeating(&HandleAccessibilityRequestCallback,
                           web_ui->GetWebContents()->GetBrowserContext()));
 
+  html_source->OverrideContentSecurityPolicy(
+      network::mojom::CSPDirectiveName::TrustedTypes,
+      "trusted-types parse-html-subset sanitize-inner-html;");
+
   web_ui->AddMessageHandler(
       std::make_unique<ElectronAccessibilityUIMessageHandler>());
 }