Add missing word to docs
Change-Id: I4087f4ef242419afaeb850304cc6092376fac75b
diff --git a/doc/source/user/jobs.rst b/doc/source/user/jobs.rst
index eefb261..aad43d7 100644
--- a/doc/source/user/jobs.rst
+++ b/doc/source/user/jobs.rst
@@ -109,7 +109,7 @@
Zuul supplies not only the variables specified by the job definition
to Ansible, but also some variables from the Zuul itself.
-When a pipeline is triggered an action, it enqueues items which may
+When a pipeline is triggered by an action, it enqueues items which may
vary based on the pipeline's configuration. For example, when a new
change is created, that change may be enqueued into the pipeline,
while a tag may be enqueued into the pipeline when it is pushed.