Update multi and child pipeline screenshots

These screenshots were out of date, and need to be
updated to reflect the current UI

doc/ci/pipelines/multi_project_pipelines.md

@@ -321,7 +321,7 @@ downstream projects. On self-managed instances, an administrator can change this
 When you configure GitLab CI/CD for your project, you can visualize the stages of your
 [jobs](index.md#configure-a-pipeline) on a [pipeline graph](index.md#visualize-pipelines).
 
-![Multi-project pipeline graph](img/multi_project_pipeline_graph.png)
+![Multi-project pipeline graph](img/multi_project_pipeline_graph_v14_3.png)
 
 In the merge request, on the **Pipelines** tab, multi-project pipeline mini-graphs are displayed.
 They expand and are shown adjacent to each other when hovering (or tapping on touchscreen devices).

doc/ci/pipelines/parent_child_pipelines.md

@@ -23,7 +23,7 @@ Additionally, sometimes the behavior of a pipeline needs to be more dynamic. The
 to choose to start sub-pipelines (or not) is a powerful ability, especially if the
 YAML is dynamically generated.
 
-![Parent pipeline graph expanded](img/parent_pipeline_graph_expanded_v12_6.png)
+![Parent pipeline graph expanded](img/parent_pipeline_graph_expanded_v14_3.png)
 
 Similarly to [multi-project pipelines](multi_project_pipelines.md), a pipeline can trigger a
 set of concurrently running child pipelines, but within the same project: