Updates Release notes for 1.3.11 (#4428)

* chore: Adds 1.3.11 release notes

Signed-off-by: Ashwin P Chandran <ashwinpc@amazon.com>

* chore: Adds 1.3.11 release notes updated

Signed-off-by: Ashwin P Chandran <ashwinpc@amazon.com>

* chore: Adds 1.3.11 release notes adds skipped changelog PR

Signed-off-by: Ashwin P Chandran <ashwinpc@amazon.com>

---------

Signed-off-by: Ashwin P Chandran <ashwinpc@amazon.com>

Author: ashwin-pc

release-notes/opensearch-dashboards.release-notes-1.3.11.md

@@ -3,6 +3,7 @@
 ### 🛡 Security
 
 - [CVE-2022-1537] Bump grunt from `1.5.2` to `1.5.3` ([#4276](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4276))
+- [CVE-2020-15366] Bump ajv from `4.11.8` to `6.12.6` ([#3769](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3769))
 
 ### 📈 Features/Enhancements
 
@@ -15,3 +16,4 @@
 ### 📝 Documentation
 
 ### 🛠 Maintenance
+