build: [gn] add //ui/strings:app_locale_settings to locale pak

Fixes a crash on Windows when accessing IDS_UI_FONT_FAMILY

electron_paks.gni

@@ -142,10 +142,12 @@ template("electron_paks") {
 
     source_patterns = [
       "${root_gen_dir}/content/app/strings/content_strings_",
+      "${root_gen_dir}/ui/strings/app_locale_settings_",
       "${root_gen_dir}/ui/strings/ui_strings_",
     ]
     deps = [
       "//content/app/strings",
+      "//ui/strings:app_locale_settings",
       "//ui/strings:ui_strings",
     ]