add 1.1.2 release note

Author: rondogency

doc/api/training/sdp_versions/latest.rst

@@ -1,5 +1,5 @@
 
-Version 1.1.1 (Latest)
+Version 1.1.2 (Latest)
 ======================
 
 .. toctree::

doc/api/training/smd_data_parallel_release_notes/smd_data_parallel_change_log.md

@@ -1,3 +1,17 @@
+# Sagemaker Distributed Data Parallel 1.1.2 Release Notes
+
+* New Features
+* Bug Fixes
+* Known Issues
+
+*Bug Fixes:*
+
+* Fixed a bug that caused some TensorFlow operations to not work with certain data types. Operations forwarded from C++ have been extended to support every dtype supported by NCCL.
+
+*Known Issues:*
+
+* SageMaker distributed data parallel has slower throughput than NCCL when run using a single node. For the best performance, use multi-node distributed training with smdistributed.dataparallel. Use a single node only for experimental runs while preparing your training pipeline.
+
 # Sagemaker Distributed Data Parallel 1.1.1 Release Notes
 
 * New Features