chore: update changelog for version 3.2.0 (#12655)

- [x] update changelog for version 3.2.0

---------

Co-authored-by: Emmett Butler <[email protected]>

CHANGELOG.md

@@ -2,6 +2,28 @@
 
 Changelogs for versions not listed here can be found at https://github.com/DataDog/dd-trace-py/releases
 
+---
+
+## 3.2.0
+
+### New Features
+
+
+  - ASM: This introduces auto instrumentation of signup events for Django.
+### Upgrade Notes
+
+  - ASM: To align across products, we're replacing `DD_EXPERIMENTAL_APPSEC_STANDALONE_ENABLED` with `DD_APM_TRACING_ENABLED`. Feature set remains the same.
+  - Bumps libdatadog dependency to v16.0.3.
+
+### Bug Fixes
+
+  - celery: When multiple broker URLs are provided as a list, use the first broker URL from a list to avoid parsing errors.
+  - CI Visibility: This fix resolves an issue where ddtrace's own sys.monitoring coverage tool in Python 3.12+ would block other sys.monitoring tools such as pytest-cov from being used.
+  - tracing: Changes the name of the span event generated by a record\_exception call as it was not following OTEL semantics.
+  - Fixes an issue where Profiling native threads would respect the musl libc default stack size, which could cause stack overflows in certain configurations.
+  - profiling: The memory profiler has a guard to avoid re-entering its code if there are allocations during sampling. This guard was meant to be thread-local, but was not correctly declared as such. This doesn't immediately cause problems because the profiler uses try-locks to protect access to its data structures, and re-entering the code will fail to acquire the locks. But this bug could be a source of deadlocks or data corruption if the code changes substantially in the future. This fix makes the guard thread-local as originally intended.
+
+
 ---
 
 ## 3.1.0