[devhelp] AppData: add <release> tag for 3.38.0

[Sébastien Wilmet <swilmet src gnome org>]

commit 50a7cce927d4d16df202c5c04e52e0e021a6db31
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Sep 11 21:25:14 2020 +0200

    AppData: add <release> tag for 3.38.0
    
    Of course I forgot to do it when releasing the 3.38.0 version..

 data/org.gnome.Devhelp.appdata.xml.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/data/org.gnome.Devhelp.appdata.xml.in b/data/org.gnome.Devhelp.appdata.xml.in
index a2372a5b..d68f66f2 100644
--- a/data/org.gnome.Devhelp.appdata.xml.in
+++ b/data/org.gnome.Devhelp.appdata.xml.in
@@ -43,6 +43,7 @@
   <translation type="gettext">devhelp</translation>
   <update_contact>swilmet gnome org</update_contact>
   <releases>
+    <release version="3.38.0" date="2020-09-11" />
     <release version="3.37.1" date="2020-05-29" />
     <release version="3.36.2" date="2020-04-25" />
     <release version="3.36.1" date="2020-03-26" />