Update style.css

Add usability for spoiler O_o O_o

public/style/ForkBB/style.css

@@ -181,10 +181,18 @@ body,
   opacity: 0.6;
 }
 
+html[lang="ru"] #fork summary::after {
+  content: "(открыть)";
+}
+
 #fork details[open] > summary::after {
   content: "(click to close)";
 }
 
+html[lang="ru"] #fork details[open] > summary::after {
+  content: "(закрыть)";
+}
+
 #fork select {
   background-color: #D3B58D;
 }