Fix doc typo

Change-Id: Ie23dedd484e383f5a3bc8f1b5c213d8d388cfd31
diff --git a/doc/source/user/config.rst b/doc/source/user/config.rst
index b2074d1..d6830a2 100644
--- a/doc/source/user/config.rst
+++ b/doc/source/user/config.rst
@@ -974,7 +974,7 @@
 participates in a pipeline.
 
 Multiple project definitions may appear for the same project (for
-example, in a central :term:`config projects <config-project>` as wall
+example, in a central :term:`config projects <config-project>` as well
 as in a repo's own ``.zuul.yaml``).  In this case, all of the project
 definitions are combined (the jobs listed in all of the definitions
 will be run).