History: update last book access time (#10156)

frontend/apps/reader/readerui.lua

@@ -792,6 +792,7 @@ function ReaderUI:onClose(full_refresh)
         self:saveSettings()
     end
     if self.document ~= nil then
+        require("readhistory"):updateLastBookTime(self.tearing_down)
         -- Serialize the most recently displayed page for later launch
         DocCache:serialize(self.document.file)
         logger.dbg("closing document")