Prepare release for opentelemetry-util-genai v0.2b0 (#3845)

Co-authored-by: otelbot <[email protected]>

Author: otelbot[bot]

util/opentelemetry-util-genai/CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## Version 0.2b0 (2025-10-14)
 
 - Add jsonlines support to fsspec uploader
   ([https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3791](#3791))

util/opentelemetry-util-genai/src/opentelemetry/util/genai/version.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.2b0.dev"
+__version__ = "0.2b0"