Rename convdev to devops score in docs

doc/user/admin_area/monitoring/convdev.md → doc/user/admin_area/monitoring/dev_ops_score.md

 ---
-redirect_to: '../../instance_statistics/convdev.md'
+redirect_to: '../../instance_statistics/dev_ops_score.md'
 ---
 
-This document was moved to [another location](../../instance_statistics/convdev.md).
+This document was moved to [another location](../../instance_statistics/dev_ops_score.md).

doc/user/instance_statistics/convdev.md → doc/user/instance_statistics/dev_ops_score.md

-# Conversational Development Index
+# DevOps Score
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/issues/30469) in GitLab 9.3.
+> [Renamed from Conversational Development Index](https://gitlab.com/gitlab-org/gitlab/issues/20976) in GitLab 12.6.
 
 NOTE: **Note:**
 Your GitLab instance's [usage ping](../admin_area/settings/usage_statistics.md#usage-ping-core-only) must be activated in order to use this feature.
 
-The [Conversational Development](http://conversationaldevelopment.com/2017/04/16/what-is-conversational-development/) Index (ConvDev Index) gives you an overview of your entire
-instance's adoption of [Concurrent DevOps](https://about.gitlab.com/concurrent-devops/)
+The DevOps Score gives you an overview of your entire instance's adoption of
+[Concurrent DevOps](https://about.gitlab.com/concurrent-devops/)
 from planning to monitoring.
 
 This displays the usage of these GitLab features over
@@ -16,7 +16,7 @@ of top-performing instances based on [usage ping data](../admin_area/settings/us
 collected. Your score is compared to the lead score of each feature and then expressed as a percentage at the bottom of said feature.
 Your overall index score is an average of all your feature score percentages - this percentage value is presented above all the of features on the page.
 
-![ConvDev index](img/convdev_index.png)
+![DevOps Score](img/dev_ops_score.png)
 
 The page also provides helpful links to articles and GitLab docs, to help you
 improve your scores.

doc/user/instance_statistics/index.md

@@ -12,5 +12,5 @@ and can be accessed via the top bar.
 
 There are two kinds of statistics:
 
-- [Conversational Development (ConvDev) Index](convdev.md): Provides an overview of your entire instance's feature usage.
+- [Dev Ops Score](dev_ops_score.md): Provides an overview of your entire instance's feature usage.
 - [User Cohorts](user_cohorts.md): Display the monthly cohorts of new users and their activities over time.