Update docs to reflect new Security tabs

This commit includes changes to update the documentation so it
reflects the new navigation structure introduced by the additional
tab "Security & Compliance" to the project-views sidebar and
"Security" to the group-views sidebar.

* Screenshot
* Paths to the Dependency List
* Paths to the group-level security dashboard

doc/user/application_security/dependency_scanning/index.md

@@ -331,7 +331,7 @@ project's dependencies with their versions. This list can be generated only for
 [languages and package managers](#supported-languages-and-package-managers)
 supported by Gemnasium.
 
-To see the generated dependency list, navigate to your project's **Project > Dependency List**.
+To see the generated dependency list, navigate to your project's **Security & Compliance > Dependency List**.
 
 ## Versioning and release process
 

doc/user/application_security/security_dashboard/index.md

@@ -49,7 +49,7 @@ The group Security Dashboard gives an overview of the vulnerabilities of all the
 projects in a group and its subgroups.
 
 First, navigate to the Security Dashboard found under your group's
-**Overview > Security Dashboard**.
+**Security** tab.
 
 Once you're on the dashboard, at the top you should see a series of filters for:
 
@@ -58,7 +58,7 @@ Once you're on the dashboard, at the top you should see a series of filters for:
 - Report type
 - Project
 
-![dashboard with action buttons and metrics](img/dashboard.png)
+![dashboard with action buttons and metrics](img/group_security_dashboard.png)
 
 Selecting one or more filters will filter the results in this page.
 The first section is an overview of all the vulnerabilities, grouped by severity.