update CHANGELOG and bump version to 6.15.0

Author: basepi

CHANGELOG.asciidoc

@@ -29,10 +29,12 @@ endif::[]
 //===== Bug fixes
 //
 
-=== Unreleased
+[[release-notes-6.x]]
+=== Python Agent version 6.x
+
+[[release-notes-6.15.0]]
+==== 6.15.0 - 2023-02-16
 
-// Unreleased changes go here
-// When the next release happens, nest these changes under the "Python Agent version 6.x" heading
 [float]
 ===== Features
 
@@ -46,10 +48,6 @@ endif::[]
 * Fix an issue in GRPC instrumentation with unsampled transactions {pull}1740[#1740]
 * Fix error in async Elasticsearch instrumentation when spans are dropped {pull}1758[#1758]
 
-
-[[release-notes-6.x]]
-=== Python Agent version 6.x
-
 [[release-notes-6.14.0]]
 ==== 6.14.0 - 2023-01-30
 

elasticapm/version.py

@@ -28,5 +28,5 @@
 #  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 #  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-__version__ = (6, 14, 0)
+__version__ = (6, 15, 0)
 VERSION = ".".join(map(str, __version__))