pyroscope: add stability note for receive_http component (#2046)

Author: marcsanmi

docs/sources/reference/components/pyroscope/pyroscope.receive_http.md

@@ -4,8 +4,12 @@ description: Learn about pyroscope.receive_http
 title: pyroscope.receive_http
 ---
 
+<span class="badge docs-labels__stage docs-labels__item">Public preview</span>
+
 # pyroscope.receive_http
 
+{{< docs/shared lookup="stability/public_preview.md" source="alloy" version="<ALLOY_VERSION>" >}}
+
 `pyroscope.receive_http` receives profiles over HTTP and forwards them to `pyroscope.*` components capable of receiving profiles.
 
 The HTTP API exposed is compatible with the Pyroscope [HTTP ingest API](https://grafana.com/docs/pyroscope/latest/configure-server/about-server-api/).