ref(stats): Add project abuse limit explanation

docs/product/stats/index.mdx

@@ -51,6 +51,7 @@ Events and attachments discarded due to rate limits or quota. The following reas
 - **Disabled**:  Data was received for a feature or function that is not available to your organization.
 - **DSN Limit**: Traffic exceeded a rate limit defined on the client key (DSN). See [Rate Limits](/pricing/quotas/#rate-limits) for more information.
 - **Global Limit**: Traffic exceeded an organization-wider or project-wide rate limit. This setting is no longer available to most organizations.
+- **Project Abuse Limit**: Traffic exceeded a project-wide rate limit.
 - **Quota**: The monthly quota of your subscription was depleted and there is no pay-as-you-go budget left. See [Adjusting your Quota](/pricing/quotas/#adjusting-your-quota) for more information.
 - **Spike Protection**: Activated to protect from a sudden spike in event volume. See [Spike Protection](/pricing/quotas/spike-protection/) for more information.
 - **Internal Limit**: A rate limit for excessive volume was enforced by Sentry. These limits are not configurable.