chore(codegen): bump codegen version to 0.26.0 (#6844)

Author: trivikr

codegen/CHANGELOG.md

@@ -1,5 +1,14 @@
 # Smithy AWS Typescript Codegen Changelog
 
+## 0.26.0 (2025-01-22)
+
+### Features
+- Upgraded to 0.26.0 of smithy-typescript ([Release Notes](https://github.com/kuhe/smithy-typescript/blob/main/CHANGELOG.md#0260-2025-01-22))
+- Enabled profile configuration for clients ([#6728](https://github.com/aws/aws-sdk-js-v3/pull/6728))
+- Created nested clients for internal use ([#6791](https://github.com/aws/aws-sdk-js-v3/pull/6791))
+
+### Bug Fixes
+
 ## 0.25.0 (2024-11-18)
 
 ### Features