refactor: rework wording for pipeline deletion warning text

app/assets/javascripts/pipelines/components/header_component.vue

@@ -122,7 +122,7 @@ export default {
       <p>
         {{
           __(
-            'Are you sure you want to delete this pipeline? Doing so will expire all pipeline caches and delete all related objects, such as builds, logs, artifacts and triggers. This action cannot be undone.',
+            'Are you sure you want to delete this pipeline? Doing so will expire all pipeline caches and delete all related objects, such as builds, logs, artifacts, and triggers. This action cannot be undone.',
           )
         }}
       </p>

doc/ci/pipelines.md

@@ -424,7 +424,7 @@ page, then using the **Delete** button.
 
 CAUTION: **Warning:**
 Deleting a pipeline will expire all pipeline caches, and delete all related objects,
-such as builds, logs, artifacts and triggers. **This action cannot be undone.**
+such as builds, logs, artifacts, and triggers. **This action cannot be undone.**
 
 ## Most Recent Pipeline
 

locale/gitlab.pot

@@ -2095,7 +2095,7 @@ msgstr ""
 msgid "Are you sure you want to delete this pipeline schedule?"
 msgstr ""
 
-msgid "Are you sure you want to delete this pipeline? Doing so will expire all pipeline caches and delete all related objects, such as builds, logs, artifacts and triggers. This action cannot be undone."
+msgid "Are you sure you want to delete this pipeline? Doing so will expire all pipeline caches and delete all related objects, such as builds, logs, artifacts, and triggers. This action cannot be undone."
 msgstr ""
 
 msgid "Are you sure you want to erase this build?"