Fix asciidoc formatting of section title for abandon access right

Change-Id: Ic3a84b7d035d8871cf5c53ecc0c8b2dfefc690ec
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

Documentation/access-control.txt

diff --git a/Documentation/access-control.txt b/Documentation/access-control.txt
index 7027562..879d1ac 100644
--- a/Documentation/access-control.txt
+++ b/Documentation/access-control.txt
@@ -446,7 +446,7 @@
 
 [[category_abandon]]
 Abandon
-~~~~
+~~~~~~~
 
 This category controls whether users are allowed to abandon changes
 to projects in Gerrit. It can give permission to abandon a specific