fix(ins): fix typo

Author: bene2k1

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

@@ -23,7 +23,7 @@ This page list the most common issues you may encounter with your Scaleway Insta
 - You cannot perform basic HTTP operations like `GET` or `POST` on your Instance endpoint.
 
 ### Possible causes
-- Incorrect firewall rules: The Instance or Security Groups might be blocking HTTP/HTTPS ports (`80`, `443`).
+- Incorrect firewall rules: The Instance or security groups might be blocking HTTP/HTTPS ports (`80`, `443`).
 - Configuration errors in the web server: Nginx, Apache, or another web server might be misconfigured.
 - Application-level errors: Your application code may be crashing or returning incorrect responses.
 - DNS misconfiguration: The domain’s DNS settings might be pointing to the wrong IP or not updated.
@@ -56,7 +56,7 @@ This page list the most common issues you may encounter with your Scaleway Insta
 - Ping (ICMP) requests are dropped.
 
 ### Possible causes
-- Security Group settings: SSH (port `22`) or RDP (port `3389`) might not be open.
+- security groups settings: SSH (port `22`) or RDP (port `3389`) might not be open.
 - Incorrect IP address: You might be connecting to the wrong public IP.
 - User-side firewall or network: Your local network may block outbound SSH or RDP connections.
 - Instance not running: The Instance may be shut down or stuck in an error state.
@@ -68,7 +68,7 @@ This page list the most common issues you may encounter with your Scaleway Insta
 - Verify the Instance's public IP address:
    - Confirm that the IP in the Scaleway console matches the IP you are using for the connection.
 - Review security groups and local firewalls:
-   - Make sure the default Security Group allows SSH or RDP inbound traffic.
+   - Make sure the default security groups allows SSH or RDP inbound traffic.
    - Check your local firewall to ensure outbound SSH (port `22`) or RDP (port `3389`) is allowed.
 - Use the Scaleway console to connect to your Instance:
    - Try using Scaleway’s web-based terminal in the console to rule out local network issues.
@@ -166,7 +166,7 @@ This page list the most common issues you may encounter with your Scaleway Insta
 
 ### Possible causes
 - Default SMTP restriction: Access to port 25 is restricted by default to prevent spam.
-- Security Group settings: The inbound/outbound rules might block port 25.
+- security groups settings: The inbound/outbound rules might block port 25.
 - Missing or incorrect mail server configuration: Postfix, Exim, or another MTA might be misconfigured.
 
 ### Troubleshooting tips
@@ -194,7 +194,7 @@ This page list the most common issues you may encounter with your Scaleway Insta
 ### Possible causes
 - Incorrect network configuration: The routed IP might not be properly configured on your Instance.
 - No static routes set: A missing route or gateway could cause traffic to fail.
-- Security Groups or firewall blocking: The traffic from or to the routed IP might be filtered.
+- security groups or firewall blocking: The traffic from or to the routed IP might be filtered.
 
 ### Troubleshooting tips
 - Verify the IP configuration in the Scaleway console: