[gnome-photos] help-overlay: Use singular for actions that only work on single photos

[Debarshi Ray <debarshir src gnome org>]

commit 1d228ae988ea976f1901af484e266b13e0c196c1
Author: Sabri Ünal <libreajans gmail com>
Date:   Sun Feb 9 18:37:04 2020 +0300

    help-overlay: Use singular for actions that only work on single photos
    
    https://gitlab.gnome.org/GNOME/gnome-photos/-/merge_requests/119

 src/photos-help-overlay.ui | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/photos-help-overlay.ui b/src/photos-help-overlay.ui
index b42ffdaf..72e61b0e 100644
--- a/src/photos-help-overlay.ui
+++ b/src/photos-help-overlay.ui
@@ -110,14 +110,14 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
-                <property name="title" translatable="yes" context="shortcut window">Export selected 
photos</property>
+                <property name="title" translatable="yes" context="shortcut window">Export selected 
photo</property>
                 <property name="accelerator">&lt;Primary&gt;x</property>
               </object>
             </child>
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
-                <property name="title" translatable="yes" context="shortcut window">Print selected 
photos</property>
+                <property name="title" translatable="yes" context="shortcut window">Print selected 
photo</property>
                 <property name="accelerator">&lt;Primary&gt;p</property>
               </object>
             </child>