[evolution] I#592 - Typo in translatable string

[Milan Crha <mcrha src gnome org>]

commit d513e5fda82f982d2b6e050c054507e7f7916aab
Author: Milan Crha <mcrha redhat com>
Date:   Mon Aug 26 15:07:05 2019 +0200

    I#592 - Typo in translatable string
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/592

 data/org.gnome.evolution.plugin.itip.gschema.xml.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/org.gnome.evolution.plugin.itip.gschema.xml.in 
b/data/org.gnome.evolution.plugin.itip.gschema.xml.in
index 6683c7722e..09b1ba29d9 100644
--- a/data/org.gnome.evolution.plugin.itip.gschema.xml.in
+++ b/data/org.gnome.evolution.plugin.itip.gschema.xml.in
@@ -7,7 +7,7 @@
     </key>
     <key name="preserve-reminder" type="b">
       <default>true</default>
-      <_summary>Preserve exiting reminder by default</_summary>
+      <_summary>Preserve existing reminder by default</_summary>
       <_description>Whether to preset option to preserve existing reminder by default</_description>
     </key>
   </schema>