Editorial: update HTTP request duration metrics stability in yaml (to stable) (#587)

CHANGELOG.md

@@ -52,6 +52,9 @@ release.
   ([#488](https://github.com/open-telemetry/semantic-conventions/pull/488))
 - Remove no longer relevant Oct 1 mention from `OTEL_SEMCONV_STABILITY_OPT_IN`
   ([#541](https://github.com/open-telemetry/semantic-conventions/pull/541))
+- Update stability definitions of HTTP client and server duration metrics to
+  be consistent with markdown.
+  ([#587](https://github.com/open-telemetry/semantic-conventions/pull/587))
 
 ## v1.23.1 (2023-11-17)
 

model/metrics/http.yaml

@@ -29,6 +29,7 @@ groups:
     brief: "Duration of HTTP server requests."
     instrument: histogram
     unit: "s"
+    stability: stable
     extends: metric_attributes.http.server
 
   - id: metric.http.server.active_requests
@@ -92,6 +93,7 @@ groups:
     brief: "Duration of HTTP client requests."
     instrument: histogram
     unit: "s"
+    stability: stable
     extends: metric_attributes.http.client
 
   - id: metric.http.client.request.body.size