[shotwell] Use a Unicode apostrophe in a new string

[Piotr Drąg <piotrdrag src gnome org>]

commit e3b2d21a7fa5cb14435f4a5f505cec70551e5b94
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Apr 1 15:06:07 2018 +0200

    Use a Unicode apostrophe in a new string
    
    See https://developer.gnome.org/hig/stable/typography.html
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772339

 src/import-roll/ImportRollBranch.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/import-roll/ImportRollBranch.vala b/src/import-roll/ImportRollBranch.vala
index 314055d..7e1a7d2 100644
--- a/src/import-roll/ImportRollBranch.vala
+++ b/src/import-roll/ImportRollBranch.vala
@@ -41,6 +41,6 @@ public class ImportRoll.Branch : Sidebar.Branch {
 
 private class ImportRoll.Root : Sidebar.Header {
     public Root() {
-        base (_("Imports"), _("Browse the library's import history"));
+        base (_("Imports"), _("Browse the library’s import history"));
     }
 }