chore: bump version to 2.52.0 [skip ci]

Author: github-actions[bot]

CHANGELOG.md

@@ -1,3 +1,20 @@
+## [v2.52.0](https://github.com/docling-project/docling/releases/tag/v2.52.0) - 2025-09-11
+
+### Feature
+
+* Enrichment steps on all convert pipelines (incl docx, html, etc) ([#2251](https://github.com/docling-project/docling/issues/2251)) ([`2c91234`](https://github.com/docling-project/docling/commit/2c9123419f541feda8cc98c53aeb37288fabcaee))
+
+### Fix
+
+* Add missing features in ThreadedStandardPdfPipeline ([#2252](https://github.com/docling-project/docling/issues/2252)) ([`0700af2`](https://github.com/docling-project/docling/commit/0700af212cce8d90dbe0477dcb06d69370649e97))
+* Address deprecation warnings of dependencies ([#2237](https://github.com/docling-project/docling/issues/2237)) ([`c696549`](https://github.com/docling-project/docling/commit/c6965495a22703d0e35105b5daafcaaf8a8063d6))
+
+### Documentation
+
+* Add an example of RAG with OpenSearch ([#2238](https://github.com/docling-project/docling/issues/2238)) ([`f8cc545`](https://github.com/docling-project/docling/commit/f8cc545bab07e5fdd79bcff7042e9279e18926c6))
+* Add instructions for using Docling with MCP to README ([#2219](https://github.com/docling-project/docling/issues/2219)) ([`e5cd702`](https://github.com/docling-project/docling/commit/e5cd7020bd281aea63519db9a5332dd2dcca54b4))
+* Document VLM support requirement in extraction example ([#2231](https://github.com/docling-project/docling/issues/2231)) ([`55f5f37`](https://github.com/docling-project/docling/commit/55f5f3752f33f5b495cb2af5e6a3aee5d157fad8))
+
 ## [v2.51.0](https://github.com/docling-project/docling/releases/tag/v2.51.0) - 2025-09-05
 
 ### Feature

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "docling"
-version = "2.51.0"  # DO NOT EDIT, updated automatically
+version = "2.52.0"  # DO NOT EDIT, updated automatically
 description = "SDK and CLI for parsing PDF, DOCX, HTML, and more, to a unified document representation for powering downstream workflows such as gen AI applications."
 license = "MIT"
 keywords = [