[AUTO] Add release notes for 3.6.0 (#719)

* Add release notes for 3.6.0

Signed-off-by: opensearch-ci <opensearch-infra@amazon.com>

* Add release notes for 3.6.0

Signed-off-by: opensearch-ci <opensearch-infra@amazon.com>

---------

Signed-off-by: opensearch-ci <opensearch-infra@amazon.com>

Author: opensearch-ci-bot

release-notes/opensearch-skills.release-notes-3.6.0.0.md

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+## Version 3.6.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 3.6.0
+
+### Features
+
+* Add SearchAroundTool to search N documents around a given document ([#702](https://github.com/opensearch-project/skills/pull/702))
+* Add MetricChangeAnalysisTool for detecting and analyzing metric changes via percentile comparison between baseline and selection periods ([#698](https://github.com/opensearch-project/skills/pull/698))
+
+### Enhancements
+
+* Add filter support for LogPatternAnalysisTool to enable log pattern analysis for specific services ([#707](https://github.com/opensearch-project/skills/pull/707))
+* Update default tool descriptions for LogPatternAnalysisTool and DataDistributionTool to improve clarity for LLM usage ([#703](https://github.com/opensearch-project/skills/pull/703))
+
+### Maintenance
+
+* Update Apache Spark dependencies (spark-common-utils_2.13) from 3.5.4 to 3.5.8 ([#713](https://github.com/opensearch-project/skills/pull/713))