Remove repeated text from headers in CI/CD landing page

doc/ci/index.md

@@ -38,7 +38,7 @@ read the [Introduction to CI/CD with GitLab](introduction/index.md).
   <iframe src="https://www.youtube.com/embed/ljth1Q5oJoo" frameborder="0" allowfullscreen="true"> </iframe>
 </figure>
 
-## GitLab CI/CD concepts
+## Concepts
 
 GitLab CI/CD uses a number of concepts to describe and run your build and deploy.
 
@@ -53,7 +53,7 @@ GitLab CI/CD uses a number of concepts to describe and run your build and deploy
 | [Pipeline efficiency](pipelines/pipeline_efficiency.md) | Configure your pipelines to run quickly and efficiently.                       |
 | [Test cases](test_cases/index.md)                       | Create testing scenarios.                                                      |
 
-## GitLab CI/CD configuration
+## Configuration
 
 GitLab CI/CD supports numerous configuration options:
 
@@ -72,7 +72,7 @@ GitLab CI/CD supports numerous configuration options:
 Certain operations can only be performed according to the
 [user](../user/permissions.md#gitlab-cicd-permissions) and [job](../user/permissions.md#job-permissions) permissions.
 
-## GitLab CI/CD features
+## Features
 
 GitLab CI/CD features, grouped by DevOps stage, include:
 
@@ -110,7 +110,7 @@ GitLab CI/CD features, grouped by DevOps stage, include:
 | [License Compliance](../user/compliance/license_compliance/index.md) **(ULTIMATE)**             | Search your project dependencies for their licenses.                                                                           |
 | [Security Test reports](../user/application_security/index.md) **(ULTIMATE)**                   | Check for app vulnerabilities.                                                                                                 |
 
-## GitLab CI/CD examples
+## Examples
 
 See the [CI/CD examples](examples/index.md) page for example project code and tutorials for
 using GitLab CI/CD with various:
@@ -119,7 +119,7 @@ using GitLab CI/CD with various:
 - Languages
 - Platforms
 
-## GitLab CI/CD Administration
+## Administration
 
 You can change the default behavior of GitLab CI/CD for:
 
@@ -136,7 +136,7 @@ Learn more about GitLab CI/CD:
 
 - [Why you might choose GitLab CI/CD](https://about.gitlab.com/blog/2016/10/17/gitlab-ci-oohlala/).
 - [Reasons you might migrate from another platform](https://about.gitlab.com/blog/2016/07/22/building-our-web-app-on-gitlab-ci/).
-- [5 Teams that made the switch to GitLab CI/CD](https://about.gitlab.com/blog/2019/04/25/5-teams-that-made-the-switch-to-gitlab-ci-cd/)
+- [Five teams that made the switch to GitLab CI/CD](https://about.gitlab.com/blog/2019/04/25/5-teams-that-made-the-switch-to-gitlab-ci-cd/).
 - If you use VS Code to edit your GitLab CI/CD configuration, the
   [GitLab Workflow VS Code extension](../user/project/repository/vscode.md) helps you
   [validate your configuration](https://marketplace.visualstudio.com/items?itemName=GitLab.gitlab-workflow#validate-gitlab-ci-configuration)

doc/ci/migration/jenkins.md

@@ -199,7 +199,7 @@ GitLab takes advantage of our connected ecosystem to automatically pull these ki
 your merge requests, pipeline details pages, and other locations. You may find that you actually don't
 need to configure anything to have these appear.
 
-If they aren't working as expected, or if you'd like to see what's available, our [CI feature index](../index.md#gitlab-cicd-features) has the full list
+If they aren't working as expected, or if you'd like to see what's available, our [CI/CD feature index](../index.md#features) has the full list
 of bundled features and links to the documentation for each.
 
 ### Templates