keep consistent messages, with fullstop at end

interface/src/app/main/Help.tsx

@@ -148,7 +148,7 @@ const Help = () => {
 
       <Box p={2} color="warning.main">
         <Typography mb={1} variant="body1">
-          {LL.HELP_INFORMATION_4()}
+          {LL.HELP_INFORMATION_4()}.
         </Typography>
         <Button
           startIcon={<DownloadIcon />}