update installed finish text

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>

bin/curtin_wrap.sh

@@ -17,7 +17,8 @@ fi
 
 clear
 if tail -n 2 $OUTPUT | grep -q "$INSTALL_OK"; then
-    echo "Curtin installed OK, rebooting (Press Any Key)"
+    echo ""
+    echo "Ubuntu Server is now installed, press any key to reboot into the new system."
     read a
     echo "Rebooting down after running $CURTIN $CMD"
     telinit 6