[EXPORTER] Fix incorrect doc comment about SessionState::TimedOut in the Elasticsearch exporter

CHANGELOG.md

@@ -15,6 +15,19 @@ Increment the:
 
 ## [Unreleased]
 
+* [EXPORTER] Fix a doc comment on the Elasticsearch log exporter's
+  `ResponseHandler::waitForResponse()` claiming a request timeout (set via
+  `SetTimeoutMs()`) arrives as a `SessionState::TimedOut` event. No
+  `HttpClient` implementation in this repo dispatches `TimedOut`; the curl
+  client maps a timeout to `SendFailed` like any other transport error, which
+  is what the comment now says.
+  [#4604](https://github.com/open-telemetry/opentelemetry-cpp/issues/4604)
+
+* [SDK] Release provider mutexes before construction-failure diagnostics so
+  custom log handlers can retrieve cached or noop tracers, loggers, and meters
+  from the same provider without deadlocking.
+  [#4693](https://github.com/open-telemetry/opentelemetry-cpp/issues/4693)
+
 * [API/SDK] Add `Enabled()` to synchronous metric instruments (ABI v2). It
   returns `false` when the Meter is disabled or every matching view uses the
   Drop aggregation

exporters/elasticsearch/src/es_log_record_exporter.cc

@@ -111,7 +111,8 @@ class ResponseHandler : public http_client::EventHandler
   /**
    * A method the user calls to block their thread until the request has either produced a
    * response or failed. The longest duration is the timeout of the request, set by
-   * SetTimeoutMs(), which arrives here as a TimedOut session event.
+   * SetTimeoutMs(); the curl client reports that as a SendFailed session event, the same as any
+   * other transport failure, since it does not distinguish a timeout from other CURL errors.
    */
   bool waitForResponse()
   {