[network-manager-openvpn] properties: fix a minor typo

[Piotr Drąg <piotrdrag src gnome org>]

commit 8b44d548b4ab5a8776f51da6804562ebbdb1d712
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Wed Mar 7 19:24:53 2018 +0100

    properties: fix a minor typo

 properties/nm-openvpn-dialog.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/properties/nm-openvpn-dialog.ui b/properties/nm-openvpn-dialog.ui
index 368f4e3..93068a4 100644
--- a/properties/nm-openvpn-dialog.ui
+++ b/properties/nm-openvpn-dialog.ui
@@ -1899,7 +1899,7 @@ config: ns-cert-type client|server</property>
                               <object class="GtkFileChooserButton" id="tls_auth_chooser">
                                 <property name="visible">True</property>
                                 <property name="can_focus">False</property>
-                                <property name="tooltip_text" translatable="yes">Add an additional layer of 
HMAC authentication on top of the TLS control channel to protect against DoS attacks. In case of TLS-Crypt 
mode, the control channal is also encrypted.
+                                <property name="tooltip_text" translatable="yes">Add an additional layer of 
HMAC authentication on top of the TLS control channel to protect against DoS attacks. In case of TLS-Crypt 
mode, the control channel is also encrypted.
 config: tls-auth &lt;file&gt; [direction] | tls-crypt &lt;file&gt;</property>
                                 <property name="hexpand">True</property>
                               </object>