Update changelog for integrations/opensearch (#1867)

Co-authored-by: davidsbatista <7937824+davidsbatista@users.noreply.github.com>

Author: HaystackBot

integrations/opensearch/CHANGELOG.md

@@ -1,7 +1,26 @@
 # Changelog
 
+## [integrations/opensearch-v4.0.1] - 2025-05-28
+
+### 🚀 Features
+
+- Adding an `HybridRetriever` as a `Supercomponent` having `OpenSearch` as the document store (#1701)
+
+### 🚜 Refactor
+
+- Use `component_to_dict` in OpenSearchHybridRetriever (#1866)
+
+### 📚 Documentation
+
+- Add usage example to OpenSearchDocumentStore docstring (#1690)
+
+### 🧪 Testing
+
+- OpenSearch - reorganize test suite (#1563)
+
 ## [integrations/opensearch-v4.0.0] - 2025-03-26
 
+
 ### 🌀 Miscellaneous
 
 - Feat!: OpenSearch - apply `return_embedding` to `filter_documents` (#1562)
@@ -12,6 +31,7 @@
 
 - OpenSearch custom_query use without filters (#1554)
 
+
 ### ⚙️ CI
 
 - Review testing workflows (#1541)
@@ -26,6 +46,7 @@
 
 - OpenSearch - call _ensure_index_exists only at initialization (#1522)
 
+
 ## [integrations/opensearch-v3.0.0] - 2025-03-11
 
 ### 🐛 Bug Fixes
@@ -50,6 +71,7 @@
 
 - OpenSearch - async support (#1414)
 
+
 ## [integrations/opensearch-v2.0.0] - 2025-02-14
 
 ### 🚀 Features