chore(main): release 2.21.1

Author: release-please[bot]

CHANGELOG.md

@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/bigframes/#history
 
+## [2.21.1](https://github.com/googleapis/python-bigquery-dataframes/compare/v2.21.0...v2.21.1) (2025-09-18)
+
+
+### Bug Fixes
+
+* Transformers with non-standard column names throw errors ([#2089](https://github.com/googleapis/python-bigquery-dataframes/issues/2089)) ([a2daa3f](https://github.com/googleapis/python-bigquery-dataframes/commit/a2daa3fffe6743327edb9f4c74db93198bd12f8e))
+
 ## [2.21.0](https://github.com/googleapis/python-bigquery-dataframes/compare/v2.20.0...v2.21.0) (2025-09-17)
 
 

bigframes/version.py

@@ -12,8 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.21.0"
+__version__ = "2.21.1"
 
 # {x-release-please-start-date}
-__release_date__ = "2025-09-17"
+__release_date__ = "2025-09-18"
 # {x-release-please-end}

third_party/bigframes_vendored/version.py

@@ -12,8 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.21.0"
+__version__ = "2.21.1"
 
 # {x-release-please-start-date}
-__release_date__ = "2025-09-17"
+__release_date__ = "2025-09-18"
 # {x-release-please-end}