Fix indentation within codeblock

Author: RebeccaTamachiro

src/content/docs/dns/nameservers/custom-nameservers/account-custom-nameservers.mdx

@@ -69,11 +69,11 @@ Cloudflare will assign an IPv4 and an IPv6 address to each ACNS name.
 To make these ACNS the default nameservers for all new zones added to your account from now on, use the endpoint [Update DNS Settings for an Account](/api/operations/dns-settings-for-an-account-update-dns-settings). Within the `zone_defaults` object, set the following:
 
 ```txt
-    "zone_defaults": {
-      "nameservers": {
-        "type": "custom.account"
-      }
-    }
+"zone_defaults": {
+  "nameservers": {
+    "type": "custom.account"
+  }
+}
 ```
 
 ## Disable account custom nameservers

src/content/docs/dns/nameservers/custom-nameservers/tenant-custom-nameservers.mdx

@@ -58,11 +58,11 @@ If the parameter `ns_set` is omitted, the default set `1` will be assigned.
 To make these TCNS the default namerservers for all new zones added to your account from now on, use the endpoint [Update DNS Settings for an Account](/api/operations/dns-settings-for-an-account-update-dns-settings). Within the `zone_defaults` object, set the following:
 
 ```txt
-    "zone_defaults": {
-      "nameservers": {
-        "type": "custom.tenant"
-      }
-    }
+"zone_defaults": {
+  "nameservers": {
+    "type": "custom.tenant"
+  }
+}
 ```
 ### Disable tenant custom nameservers on a zone