Fix ENV Format

Author: egelhaus

components/snippets/installation-pre-reqs.mdx

@@ -11,7 +11,9 @@ Postiz marks it's login cookies as Secure, this is called “secure context” i
 If you want to use an secure Login Process, you need to set up an Certificate, which can be done via Reverse Proxy like Caddy or Nginx.
 
 If you cannot use a certificate (HTTPS), add the following environment variable to your `.env` file:
-`NOT_SECURED=true`
+```env
+NOT_SECURED=true
+```
 **Security Warning**: Setting `NOT_SECURED=true` disables secure cookie requirements. This should only be used in development environments or when you fully understand the security implications. Not recommended for production use.
 
 #### Network Ports