chore: bump version to 2.21.0 [skip ci]

Author: github-actions[bot]

CHANGELOG.md

@@ -1,3 +1,14 @@
+## [v2.21.0](https://github.com/DS4SD/docling-core/releases/tag/v2.21.0) - 2025-02-27
+
+### Feature
+
+* Add inline groups, revamp Markdown export incl. list groups ([#156](https://github.com/DS4SD/docling-core/issues/156)) ([`2abaf9b`](https://github.com/DS4SD/docling-core/commit/2abaf9b53736187adec0266c5ed8b9acff008f6e))
+
+### Fix
+
+* **markdown:** Fix case of leading list ([#174](https://github.com/DS4SD/docling-core/issues/174)) ([`c77c59b`](https://github.com/DS4SD/docling-core/commit/c77c59bec09d4b8093771935393f558cf319ec29))
+* Properly handle missing page image case for export_to_html ([#166](https://github.com/DS4SD/docling-core/issues/166)) ([`4708f93`](https://github.com/DS4SD/docling-core/commit/4708f933a7ef87e4637f5bea07e6e4f296abc51a))
+
 ## [v2.20.0](https://github.com/DS4SD/docling-core/releases/tag/v2.20.0) - 2025-02-19
 
 ### Feature

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "docling-core"
-version = "2.20.0"
+version = "2.21.0"
 description = "A python library to define and validate data types in Docling."
 license = "MIT"
 authors = [