Fix type and update mailing list status

Author: thedjnK

README.md

@@ -32,7 +32,7 @@ Where '~/' is the location of where you want it extracted to, '~/' will extract
 
 ##Help and contributing
 
-There are various instructions and help pages available on the [wiki site](https://github.com/LairdCP/UwTerminalX/wiki/), there is also a mailing list that you can subscribe to at uwterminalx@librelist.com
+There are various instructions and help pages available on the [wiki site](https://github.com/LairdCP/UwTerminalX/wiki/), due to problems with the service the UwTerminalX mailing list is currently unavailable.
 
 Laird encourages people to branch/fork UwTerminalX to modify the code and accepts pull requests to merge these changes back into the main repository.
 

UwxMainWindow.cpp

@@ -3864,7 +3864,7 @@ MainWindow::on_combo_COM_currentIndexChanged(
         else
         {
             //No such port
-            ui->label_SerialInfo->setText("Invalid serisl port selected");
+            ui->label_SerialInfo->setText("Invalid serial port selected");
         }
     }
     else