Update understanding-nacls.mdx

update frontmatter

Author: iManu

pages/vpc/reference-content/understanding-nacls.mdx

@@ -104,4 +104,4 @@ NACLs are currently available only via the Scaleway API and developer tools. The
 NACL quotas are as follows:
 
 - A maximum of 255 rules for IPv4 (per VPC)
-- A maximum of 255 rules for IPv6 (per VPC)
+- A maximum of 255 rules for IPv6 (per VPC)