update changelog for version 2.19.1 via release script

CHANGELOG.md

@@ -2,6 +2,20 @@
 
 Changelogs for versions not listed here can be found at https://github.com/DataDog/dd-trace-py/releases
 
+---
+
+## 2.19.1
+
+
+### Bug Fixes
+
+- tracing(django): Fixes issue where django cache is represented as a django service rather than the third party service.
+- botocore: Resolves formatting errors in the bedrock integration when parsing request model IDs, which can now accept AWS ARNs.
+- Fixes an issue where the memory allocation profiler can cause a segmentation fault due to data races when accessing its own global data structures from multiple threads.
+- profiling: Fixes a bug where profiling mutexes were not cleared on fork in the child process. This could cause deadlocks in certain configurations.
+- profiling: Removed a system call from the memory allocation profiler, used to detect forks, which ran on every allocation and resulted in a significant slowdown.
+
+
 ---
 
 ## 2.18.1