Documentation: Update RELEASENOTES to include v1.1.2

Signed-off-by: Rashika Kheria <[email protected]>

RELEASENOTES.md

@@ -3,9 +3,30 @@
 # Supported Distributions
 * Amazon Linux
 * Amazon Linux 2
-* Redhat Enterprise Linux 7.0
+* Redhat Enterprise Linux 7.0 and 8.0
 * Ubuntu 16.04, 18.04 and 20.04 LTS
-* CentOS 7
+* CentOS 7 and 8
+
+# v1.1.2 release notes
+
+This release requires [Libfabric v1.11.0](https://github.com/ofiwg/libfabric/releases/tag/v1.11.0) and supports [NCCL v2.8.4](https://github.com/NVIDIA/nccl/releases/tag/v2.8.4-1)
+while maintaining backward compatibility with older NCCL versions (upto
+[NCCL v2.4.8](https://github.com/NVIDIA/nccl/releases/tag/v2.4.8-1)).
+
+It introduces the following new features and bug fixes.
+
+New Features:
+* Add support for NCCL Net v4 API
+
+Bug Fixes:
+* Handle `flush` disable configuration
+
+Testing:
+The plugin has been tested with following libfabric providers using unit tests
+bundled in the source code:
+* tcp;ofi_rxm
+* sockets
+* efa
 
 # v1.1.0 release notes