feat(ins): fix typo

Author: bene2k1

compute/instances/troubleshooting/fix-common-issues.mdx

@@ -127,7 +127,7 @@ This page list the most common issues you may encounter with your Scaleway Insta
    - Verify if another SSH key pair is associated with your [Scaleway account](https://console.scaleway.com/project/ssh-keys).
    - Login using the alternative SSH key
 
-- Use the Scaleway console to add a new SSH key
+- Use the Scaleway console to add a new SSH key:
    - Upload another SSH key in the [SSH key section](https://console.scaleway.com/project/ssh-keys) of your Instance's Scaleway project.
    - Reboot the Instance from the console to re-upload the new key to the Instance.