update changelog for version 2.16.6 via release script

CHANGELOG.md

@@ -2,6 +2,16 @@
 
 Changelogs for versions not listed here can be found at https://github.com/DataDog/dd-trace-py/releases
 
+---
+
+## 2.16.6
+
+
+### Bug Fixes
+
+  - Updates setup.py to ignore int-ptr conversion warnings for the profiler stack.pyx file. This is important because gcc 14 makes these conversions an error, alpine 3.21.0 ships with gcc 14, and any patch version of a Python alpine image cut after December 5th, 2024, will have this issue.
+
+
 ---
 
 ## 2.17.2