fixed file descriptor leaks in radio tools (#6748)

radio/src/gui/common/stdlcd/radio_tools.cpp

@@ -116,6 +116,7 @@ void menuRadioTools(event_t event)
       if (isRadioScriptTool(fno.fname))
         addRadioScriptTool(index++, path);
     }
+    f_closedir(&dir);
   }
 #endif
 
@@ -124,4 +125,4 @@ void menuRadioTools(event_t event)
   }
 
   reusableBuffer.radioTools.linesCount = index;
-}
+}