Update RELEASE_NOTES for version 1.300068.0 (#2117)

Author: okankoAMZ

RELEASE_NOTES

@@ -1,3 +1,14 @@
+========================================================================
+Amazon CloudWatch Agent 1.300068.0 (2026-05-11)
+========================================================================
+New Features
+* [Metrics] Add support for collecting Elastic Fabric Adapter (EFA) metrics on EC2 instances
+
+Bug Fixes
+* [Agent] Fix nil pointer dereference in kubernetesResolver.Stop() causing crash on shutdown
+* [Agent] Add IRSA and Pod Identity env var checks before JWT fallback in EKS detector
+* [ContainerInsights] Fix LIS scraper service selector to match renamed ec2-instance-store CSI plugin
+
 ========================================================================
 Amazon CloudWatch Agent 1.300067.0 (2026-04-17)
 ========================================================================