Remove extra h3, correct h-level, and move note outside Details

Author: RebeccaTamachiro

src/content/docs/byoip/concepts/irr-entries/best-practices.mdx

@@ -62,25 +62,23 @@ Add or update IRR entries when they meet any of these criteria:
 * The entry is incomplete or inaccurate — for example, when the route object does not show the correct origin.
 * The entry is complete but requires updating — for example, when they correspond to supernets but need to correspond to subnets used in Magic Transit.
 
-### Verification methods
-
-## IRR Explorer - Subnet prefix verification
+### Subnet prefix verification
 
 Use [IRR Explorer](https://irrexplorer.nlnog.net) to verify which ASN is associated with a subnet prefix.
 
 **Method:** Search for the subnet prefix IP, for example, `162.211.156.0/24`.
 
 **Output:** List of ASN numbers, source (route registry), and any associated errors.
 
-## IRR Explorer - ASN verification
+### ASN verification
 
 Use [IRR Explorer](https://irrexplorer.nlnog.net) to verify which prefixes are associated with an ASN.
 
 **Method:** Search for the ASN, for example `AS13335`.
 
 **Output:** List of prefixes, source, and any associated errors.
 
-## WHOIS lookup
+### WHOIS lookup
 
 Use WHOIS lookup to verify your origin ASN and routing data.
 
@@ -122,10 +120,10 @@ last-modified:  2018-03-16T16:58:06Z
 source:         APNIC
 ```
 
+</Details>
+
 :::note
 
 WHOIS output also shows the RPKI entry information for prefix IP addresses. When your WHOIS output only contains an RPKI entry, you must add the IRR entry.
 
-:::
-
-</Details>
+:::