[Backport 2.x] Added release notes for 2.12

release-notes/opensearch-dashboards-visualizations.release-notes-2.12.0.0.md

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+## Version 2.12.0.0 Release Notes
+
+Compatible with OpenSearch Dashboards 2.12.0.0
+
+### Maintenance
+
+- Increment Version to 2.11.0 ([#253](https://github.com/opensearch-project/dashboards-visualizations/pull/253))
+- Onboard Stylelint ([#229](https://github.com/opensearch-project/dashboards-visualizations/pull/229))
+- Increment version to 2.12.0.0 ([#272](https://github.com/opensearch-project/dashboards-visualizations/pull/272))
+- Rename the .babelrc file ([#294](https://github.com/opensearch-project/dashboards-visualizations/pull/294))
+- Bump Cypress version from 5.0.0 to 12.8.1 ([#296](https://github.com/opensearch-project/dashboards-visualizations/pull/296))
+- Sync dependencies with latest versions ([#310](https://github.com/opensearch-project/dashboards-visualizations/pull/310))
+- Update jest snapshots & cypress tests ([#314](https://github.com/opensearch-project/dashboards-visualizations/pull/314))
+- Move gantt-chart out from subdirectory ([#321](https://github.com/opensearch-project/dashboards-visualizations/pull/321))
+
+### Infrastructure
+
+- Onboard jenkins prod docker images to github actions ([#287](https://github.com/opensearch-project/dashboards-visualizations/pull/287))
+- [CI/CD] Add Cypress e2e workflow for gantt chart ([#298](https://github.com/opensearch-project/dashboards-visualizations/pull/298))
+- [CI/CD] Add FTR workflow for gantt chart plugin test ([#306](https://github.com/opensearch-project/dashboards-visualizations/pull/306))
+- [CI/CD] Add eslint workflow ([#316](https://github.com/opensearch-project/dashboards-visualizations/pull/316))