Merge branch 'docs-dep-scanning-additional-ca-bundle' into 'master'

Document ADDITIONAL_CA_CERT_BUNDLE env var

See merge request gitlab-org/gitlab!27733

doc/user/application_security/dependency_scanning/index.md

@@ -149,6 +149,7 @@ The following variables allow configuration of global dependency scanning settin
 | `DS_DOCKER_CLIENT_NEGOTIATION_TIMEOUT`  | 2m          | Time limit for Docker client negotiation. Timeouts are parsed using Go's [`ParseDuration`](https://golang.org/pkg/time/#ParseDuration). Valid time units are `ns`, `us` (or `µs`), `ms`, `s`, `m`, or `h`. For example, `300ms`, `1.5h`, or `2h45m`. |
 | `DS_PULL_ANALYZER_IMAGE_TIMEOUT`        | 5m          | Time limit when pulling an analyzer's image. Timeouts are parsed using Go's [`ParseDuration`](https://golang.org/pkg/time/#ParseDuration). Valid time units are `ns`, `us` (or `µs`), `ms`, `s`, `m`, or `h`. For example, `300ms`, `1.5h`, or `2h45m`. |
 | `DS_RUN_ANALYZER_TIMEOUT`               | 20m         | Time limit when running an analyzer. Timeouts are parsed using Go's [`ParseDuration`](https://golang.org/pkg/time/#ParseDuration). Valid time units are `ns`, `us` (or `µs`), `ms`, `s`, `m`, or `h`. For example, `300ms`, `1.5h`, or `2h45m`. |
+| `ADDITIONAL_CA_CERT_BUNDLE`   |  | Bundle of CA certs that you want to trust. |
 
 #### Configuring specific analyzers used by Dependency Scanning