Correct link to GitLab SSH key documentation

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>

content/guides/how_to_build_your_first_image.md

@@ -48,8 +48,8 @@ For this, you need to go into `Preferences`:
 
 Then, into the `SSH Keys` part:
 ![](/images/apertis_gitlab_ssh.png)
-The instructions [to generate a new key](https://gitlab.apertis.org/help/ssh/index#generate-an-ssh-key-pair)
-or [to add an existing one](https://gitlab.apertis.org/help/ssh/index#see-if-you-have-an-existing-ssh-key-pair)
+The instructions [to generate a new key](https://gitlab.apertis.org/help/user/ssh.md#generate-an-ssh-key-pair)
+or [to add an existing one](https://gitlab.apertis.org/help/user/ssh.md#see-if-you-have-an-existing-ssh-key-pair)
 are available.
 Please follow the relevant one to configure your SSH key.