Merge branch 'docs/dependency-proxy-permissions' into 'master'

Add dependency proxy to permissions.md

Closes gitlab-ee#12075

See merge request gitlab-org/gitlab-ce!29497

doc/user/permissions.md

@@ -197,7 +197,7 @@ the group. The following table depicts the various user permission levels in a
 group.
 
 | Action                                          | Guest | Reporter | Developer | Maintainer | Owner |
-|---------------------------------------|-------|----------|-----------|------------|-------|
+|-------------------------------------------------|-------|----------|-----------|------------|-------|
 | Browse group                                    | ✓     | ✓        | ✓         | ✓          | ✓     |
 | View Insights charts **[ULTIMATE]**             | ✓     | ✓        | ✓         | ✓          | ✓     |
 | View group epic **[ULTIMATE]**                  | ✓     | ✓        | ✓         | ✓          | ✓     |
@@ -205,6 +205,7 @@ group.
 | Manage group labels                             |       | ✓        | ✓         | ✓          | ✓     |
 | Create project in group                         |       |          | ✓         | ✓          | ✓     |
 | Create/edit/delete group milestones             |       |          | ✓         | ✓          | ✓     |
+| Enable/disable a dependency proxy **[PREMIUM]** |       |          | ✓         | ✓          | ✓     |
 | Edit group                                      |       |          |           |            | ✓     |
 | Create subgroup                                 |       |          |           |            | ✓     |
 | Manage group members                            |       |          |           |            | ✓     |