stabilize the trace context in non-OTLP formats spec

Author: dashpole

CHANGELOG.md

@@ -21,6 +21,9 @@ release.
 
 ### Compatibility
 
+- Mark the "Trace Context in non-OTLP Log Formats" specification stable.
+  ([#TODO](https://github.com/open-telemetry/opentelemetry-specification/pull/TODO))
+
 ### SDK Configuration
 
 ### Common

specification/compatibility/logging_trace_context.md

@@ -1,6 +1,6 @@
 # Trace Context in non-OTLP Log Formats
 
-**Status**: [Experimental](../document-status.md)
+**Status**: [Stable](../document-status.md)
 
 <details>
 <summary>Table of Contents</summary>