Merge branch 'sselhorn-master-patch-13388' into 'master'

Small fix for capitalization and code style

See merge request gitlab-org/gitlab!54979

doc/user/group/custom_project_templates.md

@@ -11,7 +11,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 Custom project templates are useful for organizations that need to create many similar types of [projects](../project/index.md) and want to start from the same jumping-off point.
 
-## Setting up Group-level Project Templates
+## Setting up group-level project templates
 
 To use a custom project template for a new project you need to:
 
@@ -30,7 +30,7 @@ To use a custom project template for a new project you need to:
 
 Here is a sample group/project structure for a hypothetical "Acme Co" for project templates:
 
-```txt
+```plaintext
 # GitLab instance and group
 gitlab.com/acmeco/
     # Subgroups