Update the frontmatter with serverless

alaudazzi · alaudazzi · commit 295db98e5cad · 2025-03-05T21:01:17.000+01:00
diff --git a/reference/data-analysis/observability/metrics-reference-serverless.md b/reference/data-analysis/observability/metrics-reference-serverless.md
@@ -1,6 +1,8 @@
 ---
 mapped_pages:
   - https://www.elastic.co/guide/en/serverless/current/observability-metrics-reference.html
+applies:
+  serverless: all
 ---
 
 # Metrics reference [observability-metrics-reference]
