[release] Prepare release Exporter.Geneva-1.11.3 (open-telemetry#2711)

Author: opentelemetrybot

src/OpenTelemetry.Exporter.Geneva/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.11.3
+
+Released 2025-Apr-22
+
 * Fixed an issue where accessing an unset `AFDCorrelationId` in `RuntimeContext`
   would throw unhandled exceptions.
   ([#2708](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/2708))