Apply templates to all concepts and tasks to fix double bullets in TOC (#9149)

* Apply concept template to fix double bullet issue.

* Apply concept template

* Apply templates to tasks

content/en/docs/tasks/job/parallel-processing-expansion.md

@@ -1,16 +1,21 @@
 ---
 title: Parallel Processing using Expansions
+content_template: templates/concept
 weight: 20
 ---
 
-{{< toc >}}
-
-# Example: Multiple Job Objects from Template Expansion
+{{% capture overview %}}
 
 In this example, we will run multiple Kubernetes Jobs created from
 a common template.  You may want to be familiar with the basic,
 non-parallel, use of [Jobs](/docs/concepts/jobs/run-to-completion-finite-workloads/) first.
 
+{{% /capture %}}
+
+{{< toc >}}
+
+{{% capture body %}}
+
 ## Basic Template Expansion
 
 First, download the following template of a job to a file called `job.yaml`
@@ -189,3 +194,5 @@ If you have a large number of job objects, you may find that:
 
 In this case, you can consider one of the
 other [job patterns](/docs/concepts/jobs/run-to-completion-finite-workloads/#job-patterns).
+
+{{% /capture %}}