Remove mention of projects from segments

Currently segments are only composed of groups, not projects, and
there is no limit on projects, so this removes a mention of projects
that was incorrect.

doc/user/admin_area/analytics/dev_ops_report.md

@@ -50,7 +50,7 @@ The DevOps Adoption tab shows you which segments of your organization are using
 - Deploys
 - Scanning
 
-Segments are arbitrary collections of GitLab groups and projects that you define. You might define a segment to represent a small team, a large department, or a whole organization. You are limited to creating a maximum of 20 segments, and each segment is limited to a maximum of 20 groups. Buttons to manage your segments appear in the DevOps Adoption section of the page.
+Segments are arbitrary collections of GitLab groups that you define. You might define a segment to represent a small team, a large department, or a whole organization. You are limited to creating a maximum of 20 segments, and each segment is limited to a maximum of 20 groups. Buttons to manage your segments appear in the DevOps Adoption section of the page.
 
 DevOps Adoption allows you to: