Add glossary definition and tooltip for ROA

Author: RebeccaTamachiro

src/content/docs/byoip/get-started.mdx

@@ -11,7 +11,6 @@ import { GlossaryTooltip } from "~/components"
 To bring your own IPs, you must work with your account team to understand everything you need to ensure a smooth transition during the onboarding process.
 
 :::note
-
 BYOIP is ingress only.
 :::
 
@@ -27,7 +26,7 @@ There are two major prerequisites before Cloudflare can begin onboarding your IP
     - `origin` matching the correct ASN you want to onboard
 
 :::caution[RPKI validation]
-You are not required to use <GlossaryTooltip term="Resource Public Key Infrastructure (RPKI)">Resource Public Key Infrastructure (RPKI)</GlossaryTooltip>. However, if you do, make sure your ROAs are accurate. You can use [Cloudflare's RPKI Portal](https://rpki.cloudflare.com/?view=validator) to check your prefixes.
+You are not required to use <GlossaryTooltip term="Resource Public Key Infrastructure (RPKI)">Resource Public Key Infrastructure (RPKI)</GlossaryTooltip>. However, if you do, make sure your <GlossaryTooltip term="Route Origin Authorization (ROA)">ROAs</GlossaryTooltip> are accurate. You can use [Cloudflare's RPKI Portal](https://rpki.cloudflare.com/?view=validator) to check your prefixes.
 :::
 
 After onboarding, [Border Gateway Protocol (BGP)](https://www.cloudflare.com/learning/security/glossary/what-is-bgp/) announcements for customer prefixes can be controlled with the [Dynamic Advertisement](/byoip/concepts/dynamic-advertisement/) API or via the Cloudflare dashboard.

src/content/glossary/byoip.yaml

@@ -23,6 +23,10 @@ entries:
     general_definition: |-
       a cryptographic method of signing records that associate a route with an originating autonomous system number.
 
+  - term: Route Origin Authorization (ROA)
+    general_definition: |-
+      the cryptographically signed object used for Resource Public Key Infrastructure (RPKI) validation.
+
   - term: Unicast Reverse Path Forwarding (uRPF)
     general_definition: |-
       a security feature that can prevent spoofing attacks.