Update git-clone.md

Ported depth field description from Classic for shallow clone

Author: NimRegev

_docs/pipelines/steps/git-clone.md

@@ -55,6 +55,7 @@ step_name:
 | `git` | The name of the [git integration]({{site.baseurl}}/docs/integrations/git-providers/) you want to use. If left empty, Codefresh will attempt to use the git provider that was used during account sign-up. Note that this might have unexpected results if you are changing your Git integrations.| Required| 
 | `repo`                                     | path of the repository without the domain name in the form of `my_username/my_repo`                                                                                                                                                                                       | Required                  |
 | `revision`                                 | The revision of the repository you are checking out. It can be a revision hash or a branch name. The default value is the branch you have specified in your Git provider (e.g `master` or `main`).                                                                                                     | Default                   |
+ `depth`                                 |  The number of commits to pull from the repo to create a shallow clone. Creating a shallow clone truncates the history to the number of commits specified, instead of pulling the entire history. | Optional                   |
 | `use_proxy`                                 | If set to true the Git clone process will honor `HTTP_PROXY` and `HTTPS_PROXY` variables if present for [working via a proxy](#using-git-behind-a-proxy). Default value is `false`.                                                                                                    | Default                   |
 | `credentials`                              | Credentials to access the repository, if it requires authentication. It can an object containing `username` and `password` fields. Credentials are optional if you are using the [built-in git integrations]({{site.baseurl}}/docs/integrations/git-providers/) .                                                                                             | Optional                  |
 | `fail_fast`                                | If a step fails and the process is halted. The default value is `true`.                                                                                                                                                            | Default                   |