docs: Add note that apollo_router_span is replaced `apollo_router_p…

…rocessing_time` (#4806) Fixes #4804
apollographql · Mar 15, 2024 · 0f10eb4 · 0f10eb4
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diff --git a/docs/source/configuration/telemetry/instrumentation/standard-instruments.mdx b/docs/source/configuration/telemetry/instrumentation/standard-instruments.mdx
@@ -104,3 +104,9 @@ The initial call to Uplink during router startup is not reflected in metrics.
 
 - `apollo.router.telemetry.studio.reports` - The number of reports submitted to GraphOS Studio by the Router.
   - `report.type`: The type of report submitted: "traces" or "metrics"
+
+### Deprecated
+
+The following metrics have been deprecated and should not be used.
+
+- `apollo_router_span` - **Deprecated**—use `apollo_router_processing_time` instead.