fix(tutorials): wrong frontmatter format MTA-5520 (scaleway#4325)

Author: SamyOubouaziz

tutorials/powerdns-ubuntu-bionic/index.mdx

@@ -1,15 +1,16 @@
 ---
+meta:
   title: Installing PowerDNS on Ubuntu Jammy Jellyfish (22.04 LTS)
   description: This page shows you how to install a PowerDNS server on Ubuntu Linux with a MariaDB backend
-  content:
+content:
   h1: Installing PowerDNS on Ubuntu Jammy Jellyfish (22.04 LTS)
   paragraph: This page shows you how to install a PowerDNS server on Ubuntu Linux with a MariaDB backend
-  tags: dns ubuntu PowerDNS server MariaDB
-  categories:
+tags: dns ubuntu PowerDNS server MariaDB
+categories:
     - Instances
-  dates:
-    validation: 2024-10-15
-    posted: 2020-09-10
+dates:
+  validation: 2024-10-15
+  posted: 2020-09-10
 ---
 
 The PowerDNS authoritative server is an open-source DNS server written in C++. An authoritative DNS server contains a database of public IP addresses and their associated domain names, serving the purpose of resolving those common names into machine-understandable IP addresses.