Metrics beta change disclaimer (#10283)

* Metrics beta change disclaimer

Metrics beta change disclaimer

* Create metrics-api-change.mdx

Adding disclaimer as include

* Update index.mdx

* Update index.mdx

* Update metrics-api-change.mdx

* Update index.mdx

* Update includes/metrics-api-change.mdx

* Update includes/metrics-api-change.mdx

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Co-authored-by: Liza Mock <[email protected]>

Author: ale-cota

docs/product/metrics/index.mdx

@@ -6,7 +6,9 @@ description: "Metrics help you track and visualize the data points you care abou
 
 <Include name="feature-stage-beta-metrics.mdx" />
 
-Sentry metrics are numerical values that allow you to pinpoint and solve issues impacting user experience and app performance by measuring the data points that are important to you and your application. You can track things like latency, processing time, event size, user signups, and conversion rates, and see how they correlate back to tracing data. This gives you a comprehensive understanding of the health of your systems and helps solve issues faster.
+<Include name="metrics-api-change.mdx" />
+
+Sentry metrics are numerical values that allow you to pinpoint and solve issues impacting user experience and app performance by measuring the data points that are important to you and your application. You can track things like latency, processing time, event size, user signups and conversion rates, and see how they correlate back to tracing data. This gives you a comprehensive understanding of the health of your systems and helps solve issues faster.
 
 ![Metrics UI](./img/Index.png)
 

includes/metrics-api-change.mdx

@@ -0,0 +1,3 @@
+<Alert level="warning" title="Upcoming API Changes">
+We'lll be updating our API to ensure that metrics are explicitly connected to spans. This change will improve debugging capabilities by ensuring that metrics are always contextually linked with all your Sentry data through traces. You'll eventually need to migrate to the new APIs once released. [Learn more](https://sentry.zendesk.com/hc/en-us/articles/26369339769883-Upcoming-API-Changes-to-Metrics).
+</Alert>