Adds links to project vuln API

doc/api/api_resources.md

@@ -71,6 +71,7 @@ The following API resources are available in the project context:
 | [Project milestones](milestones.md)                                 | `/projects/:id/milestones`                                                                                                                                                                            |
 | [Project snippets](project_snippets.md)                             | `/projects/:id/snippets`                                                                                                                                                                              |
 | [Project templates](project_templates.md)                           | `/projects/:id/templates`                                                                                                                                                                             |
+| [Project vulnerabilities](project_vulnerabilities.md) **(ULTIMATE)**                           | `/projects/:id/templates`                                                                                                                                                                             |
 | [Protected environments](protected_environments.md)                 | `/projects/:id/protected_environments`                                                                                                                                                                |
 | [Protected branches](protected_branches.md)                         | `/projects/:id/protected_branches`                                                                                                                                                                    |
 | [Protected tags](protected_tags.md)                                 | `/projects/:id/protected_tags`                                                                                                                                                                        |
@@ -89,7 +90,6 @@ The following API resources are available in the project context:
 | [Visual Review discussions](visual_review_discussions.md) **(PREMIUM)** | `/projects/:id/merge_requests/:merge_request_id/visual_review_discussions`                                                                                                                        |
 | [Vulnerabilities](vulnerabilities.md) **(ULTIMATE)**                | `/vulnerabilities/:id`                                                                                                                                                                       |
 | [Vulnerability exports](vulnerability_exports.md) **(ULTIMATE)**    | `/projects/:id/vulnerability_exports`                                                                                                                                                                                                                                             |
-| [Project vulnerabilities](project_vulnerabilities.md) **(ULTIMATE)**   | `/projects/:id/vulnerabilities`                                                                                                                                                                            |
 | [Vulnerability findings](vulnerability_findings.md) **(ULTIMATE)**  | `/projects/:id/vulnerability_findings`                                                                                                                                                                |
 | [Project wikis](wikis.md)                                           | `/projects/:id/wikis`                                                                                                                                                                                 |
 

doc/api/projects.md

@@ -2691,6 +2691,10 @@ Read more in the [Project import/export](project_import_export.md) documentation
 
 Read more in the [Project members](members.md) documentation.
 
+## Project vulnerabilities
+
+Read more in the [Project vulnerabilities](project_vulnerabilities.md) documentation.
+
 ## Configure pull mirroring for a project **(PREMIUM)**
 
 > - Introduced in GitLab 11.