Add release notes for v0.209.0

Author: naclonts

docs/release_notes/0.209.0.md

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+# Release v0.209.0
+
+## 🎯 Improvements
+
+- Add eksctl support for new AWS region ap-east-2 (#8406)
+
+## 🐛 Bug Fixes
+
+- Use AmazonLinux2023 as default AMI instead of AmazonLinux2 for Kubernetes version >=1.33 (#8405)
+- Fix missing permission setup for IPv6 cluster (#8387)
+
+## 🧰 Maintenance
+
+- Update aws-node to v1.19.5 (#8377)
+- Update nvidia-device-plugin to v0.17.2 (#8381)
+- Update ec2-info (#8382)
+- Update coredns (#8385)
+
+## 📝 Documentation
+
+- Fix missing permission setup for IPv6 cluster (#8387)
+
+## Acknowledgments
+
+The eksctl maintainers would like to sincerely thank @guessi and @naclonts.
+