Adding 2.13 release notes (#590)

* Adding 2.13 release notes

Signed-off-by: Joshua Palis <jpalis@amazon.com>

* Updating release notes

Signed-off-by: Joshua Palis <jpalis@amazon.com>

---------

Signed-off-by: Joshua Palis <jpalis@amazon.com>
(cherry picked from commit aa8a454)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

release-notes/opensearch-flow-framework.release-notes-2.13.0.0.md

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+## 2024-03-18 Version 2.13.0.0
+
+Compatible with OpenSearch 2.13.0
+
+### Features
+* Added create ingest pipeline step ([#558](https://github.com/opensearch-project/flow-framework/pull/558))
+* Added create search pipeline step ([#569](https://github.com/opensearch-project/flow-framework/pull/569))
+* Added create index step ([#574](https://github.com/opensearch-project/flow-framework/pull/574))
+* Added default use cases ([#583](https://github.com/opensearch-project/flow-framework/pull/583))
+
+### Enhancements
+* Substitute REST path or body parameters in Workflow Steps ([#525](https://github.com/opensearch-project/flow-framework/pull/525))
+* Added an optional workflow_step param to the get workflow steps API ([#538](https://github.com/opensearch-project/flow-framework/pull/538))
+* Add created, updated, and provisioned timestamps to saved template ([#551](https://github.com/opensearch-project/flow-framework/pull/551))
+* Enable Flow Framework by default ([#553](https://github.com/opensearch-project/flow-framework/pull/553))
+* Adding new exception type for workflow step failures ([#577](https://github.com/opensearch-project/flow-framework/pull/577))
+
+### Refactoring
+* Moved workflow-steps.json to Enum ([#523](https://github.com/opensearch-project/flow-framework/pull/523))
+* Refactored logging for consistency ([#524](https://github.com/opensearch-project/flow-framework/pull/524))