update CHANGELOG and bump version to 0.4.0 (#178)

Author: xrmx

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Elastic Distribution of OpenTelemetry Python Changelog
 
+## v0.4.0
+
+- Bump to OTel 1.28.1 (#169)
+- Enable log events by default (#154)
+- Add musl autoinstrumentation to Docker image for OTel Kubernetes operator (#162)
+- Add documentation for logging enablement (#153)
+- Add flask autoinstrumentation example (#168)
+
 ## v0.3.0
 
 - Build Python 3.12 Docker image for OTel Kubernetes operator (#132, #136. #137)

src/elasticotel/distro/version.py

@@ -14,4 +14,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"