[gnome-control-center] thunderbolt: fix grammar in a translatable string

[Piotr Drąg <piotrdrag src gnome org>]

commit 8d2fb2199e4eae63e435de7a647a70b0bd8d2c0b
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Fri Apr 13 18:54:57 2018 +0200

    thunderbolt: fix grammar in a translatable string

 panels/thunderbolt/cc-bolt-panel.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/panels/thunderbolt/cc-bolt-panel.c b/panels/thunderbolt/cc-bolt-panel.c
index e67e3625e..82fe1d9b7 100644
--- a/panels/thunderbolt/cc-bolt-panel.c
+++ b/panels/thunderbolt/cc-bolt-panel.c
@@ -185,8 +185,8 @@ bolt_client_ready (GObject      *source,
         return;
 
       g_warning ("Could not create client: %s", err->message);
-      text = _("The thunderbolt subsystem (boltd) is not installed or "
-               "not setup properly.");
+      text = _("The Thunderbolt subsystem (boltd) is not installed or "
+               "not set up properly.");
 
       gtk_label_set_label (panel->notb_details, text);
       gtk_stack_set_visible_child_name (panel->container, "no-thunderbolt");