TASK: Updating version in README

Author: ct-sdks[bot]

CHANGELOG.md

@@ -1,4 +1,32 @@
 
+# 12.13.0 (2025-06-03)
+
+## What's Changed
+* Update changelog by @ct-sdks in https://github.com/commercetools/commercetools-dotnet-core-sdk-v2/pull/453
+* Update generated SDKs by @ct-sdks in https://github.com/commercetools/commercetools-dotnet-core-sdk-v2/pull/454
+* Update generated SDKs by @ct-sdks in https://github.com/commercetools/commercetools-dotnet-core-sdk-v2/pull/455
+* Update generated SDKs by @ct-sdks in https://github.com/commercetools/commercetools-dotnet-core-sdk-v2/pull/456
+* Update generated SDKs by @ct-sdks in https://github.com/commercetools/commercetools-dotnet-core-sdk-v2/pull/457
+
+**Import changes**
+
+<details>
+<summary>Removed Property(s)</summary>
+
+- :warning: removed property `/^[a-z]{2}(-[A-Z]{2})?$/` from type `SearchKeywords`
+- :warning: removed property `/^[a-z]{2}(-[A-Z]{2})?$/` from type `LocalizedString`
+</details>
+
+
+<details>
+<summary>Added Property(s)</summary>
+
+- added property `/^[a-zA-Z]{2,3}(?:-[a-zA-Z]{4})?(?:-(?:[a-zA-Z]{2}|\d{3}))?$/` to type `SearchKeywords`
+- added property `/^[a-zA-Z]{2,3}(?:-[a-zA-Z]{4})?(?:-(?:[a-zA-Z]{2}|\d{3}))?$/` to type `LocalizedString`
+</details>
+
+**Full Changelog**: https://github.com/commercetools/commercetools-dotnet-core-sdk-v2/compare/12.12.0...12.13.0
+
 # 12.12.0 (2025-05-05)
 
 ## What's Changed