Added changes from docs channel request about Errors inbox.

src/content/docs/apm/apm-ui-pages/errors-inbox/errors-inbox.mdx

@@ -9,6 +9,10 @@ New Relic Errors inbox is a single place to proactively detect, prioritize, and
 
 Resolve errors faster with errors from across your stack, including all APM, RUM (Browser), mobile, and serverless Lambda functions data, displayed on one screen. Errors are grouped to cut down on noise and collaborating across teams is easy with shared visibility to the same error data. 
 
+<Callout variant="important">
+Errors inbox is not available in the EU region.
+</Callout>
+
 ## Why it matters [#matters]
 
 Errors inbox provides a unified error tracking experience to detect and triage errors:

src/content/docs/using-new-relic/welcome-new-relic/get-started/our-eu-us-region-data-centers.mdx

@@ -43,6 +43,7 @@ New Relic offers almost all the same active products, features, support offering
 * [Infinite Tracing](/docs/understand-dependencies/distributed-tracing/infinite-tracing/introduction-infinite-tracing) is not available.
 * APM's [weekly performance reports](/docs/apm/reports/other-performance-analysis/weekly-performance-report) are not available.
 * The [Plugins](/docs/plugins) product is unavailable and is not supported.
+* [Errors inbox](/docs/apm/apm-ui-pages/errors-inbox/errors-inbox/).
 * Deprecated products and features are not available.
 
 [New Relic's Incident Intelligence](https://docs.newrelic.com/docs/new-relic-one/use-new-relic-one/new-relic-ai/get-started-incident-intelligence) service operates solely in the U.S. Whether you store your data in New Relic’s US region data center or New Relic’s EU region data center, by using New Relic Incident Intelligence, you consent that New Relic may move your data to, and process your data in, the US region.