[gnome-boxes] wizard-source: Add missing oxford comma

[Felipe Borges <felipeborges src gnome org>]

commit 564da34f80a0656996007aae3cd436c1cbd71d94
Author: AsciiWolf <mail asciiwolf com>
Date:   Mon Apr 29 14:34:09 2019 +0000

    wizard-source: Add missing oxford comma

 data/ui/wizard-source.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/ui/wizard-source.ui b/data/ui/wizard-source.ui
index 2b0bcca7..59e8369c 100644
--- a/data/ui/wizard-source.ui
+++ b/data/ui/wizard-source.ui
@@ -382,7 +382,7 @@
                 <property name="max-width-chars">64</property>
                 <property name="halign">start</property>
                 <property name="xalign">0.0</property>
-                <property name="label" translatable="yes">Enter an address to connect to. Addresses can 
begin with spice://, rdp://, ssh:// or vnc://.</property>
+                <property name="label" translatable="yes">Enter an address to connect to. Addresses can 
begin with spice://, rdp://, ssh://, or vnc://.</property>
               </object>
               <packing>
                 <property name="expand">True</property>