Prepare release for opentelemetry-instrumentation-openai-v2 v2.3b0 (#4052)

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

Author: otelbot[bot]

instrumentation-genai/opentelemetry-instrumentation-openai-v2/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 2.3b0 (2025-12-24)
 
 - Fix `AttributeError` when handling `LegacyAPIResponse` (from `with_raw_response`)
   ([#4017](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4017))

instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/version.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.3b0.dev"
+__version__ = "2.3b0"