chore(metainfo): sync screenshots with standart theme

Signed-off-by: Boris Yumankulov <boria138@altlinux.org>

build-aux/share/metainfo/ru.linux_gaming.PortProtonQt.metainfo.xml

@@ -49,6 +49,16 @@
       <caption>Settings</caption>
       <caption xml:lang="ru">Настройки</caption>
     </screenshot>
+    <screenshot>
+      <image>https://git.linux-gaming.ru/Boria138/PortProtonQt/raw/branch/main/portprotonqt/themes/standart/images/screenshots/%D0%9A%D0%BE%D0%BD%D1%82%D0%B5%D0%BA%D1%81%D1%82%D0%BD%D0%BE%D0%B5%20%D0%BC%D0%B5%D0%BD%D1%8E.png</image>
+      <caption>Context Menu</caption>
+      <caption xml:lang="ru">Контекстное меню</caption>
+    </screenshot>
+    <screenshot>
+      <image>https://git.linux-gaming.ru/Boria138/PortProtonQt/src/branch/main/portprotonqt/themes/standart/images/screenshots/%D0%9E%D0%B2%D0%B5%D1%80%D0%BB%D0%B5%D0%B9.png</image>
+      <caption>Overlay</caption>
+      <caption xml:lang="ru">Оверлей</caption>
+    </screenshot>
   </screenshots>
   <keywords>
     <keyword translate="no">wine</keyword>