Apply suggestions from code review

Co-authored-by: Jessica <[email protected]>

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

@@ -48,7 +48,7 @@ This page lists the most common issues you may encounter with your Scaleway Inst
 - [Nginx Official Documentation](https://nginx.org/en/docs/)
 - [Apache HTTP Server Documentation](https://httpd.apache.org/docs/)
 
-## I am unable to connect to my Instance
+## I can't connect to my Instance
 
 ### Symptoms
 - Your SSH or RDP connection is timing out.
@@ -78,7 +78,7 @@ This page lists the most common issues you may encounter with your Scaleway Inst
 - [Scaleway Documentation: Troubleshooting SSH connection issues to Instances](/instances/troubleshooting/cant-connect-ssh/)
 
 
-## I cannot connect to my Instance using an SSH key
+## I can't connect to my Instance using an SSH key
 
 ### Symptoms
 - You see an "Invalid SSH key” or “Permission denied (publickey)” error.
@@ -111,7 +111,7 @@ This page lists the most common issues you may encounter with your Scaleway Inst
 - [Scaleway Documentation: How to generate an SSH key pair](/organizations-and-projects/how-to/create-ssh-key/)
 - [OpenSSH Documentation](https://www.openssh.com/manual.html)
 
-## How Can I recover access to my Instance?
+## I can't access my Instance
 
 ### Symptoms
 - You are unable to connect to your Instance via SSH.
@@ -274,7 +274,7 @@ This page lists the most common issues you may encounter with your Scaleway Inst
 - [Scaleway Documentation: Preventing outgoing DDoS](/instances/reference-content/preventing-outgoing-ddos/)
 - [Scaleway Tutorial: Configuring Firewalls for Instances](/tutorials/installation-uncomplicated-firewall/)
 
-## I cannot delete my Instance
+## I can't delete my Instance
 
 ### Symptoms
 - Attempts to delete the Instance fail with an “Instance is protected” error.