[gnome-boxes] help: Remove double "the" in documentation

[Felipe Borges <felipeborges src gnome org>]

commit d16cd96d7d884471692ece341a176e2e308e1e56
Author: Jordi Mas <jmas softcatala org>
Date:   Mon Mar 7 19:18:51 2022 +0000

    help: Remove double "the" in documentation

 help/C/edit-domain.page | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/C/edit-domain.page b/help/C/edit-domain.page
index 9f73d846..c7957297 100644
--- a/help/C/edit-domain.page
+++ b/help/C/edit-domain.page
@@ -27,7 +27,7 @@
     what GNOME Boxes exposes in its user interface.</p>
   </comment>
 
-  <p>Boxes enables you to manually edit the the <sys>Libvirt</sys> domain configuration XML of your
+  <p>Boxes enables you to manually edit the <sys>Libvirt</sys> domain configuration XML of your
   box. You can achieve specific setups which are not exposed in the Boxes interface and neither supported
   by the Boxes developers.</p>