Update README with LTS information (#17)

Author: aggarw13

README.md

@@ -16,6 +16,8 @@ unlikely to succeed.
 
 See memory requirements for this library [here](https://docs.aws.amazon.com/embedded-csdk/202012.00/lib-ref/libraries/standard/backoffAlgorithm/docs/doxygen/output/html/index.html#backoff_algorithm_memory_requirements).
 
+**backoffAlgorithm v1.0.0 [source code](https://github.com/FreeRTOS/backoffAlgorithm/tree/v1.0.0/source) is part of the [FreeRTOS 202012.00 LTS](https://github.com/FreeRTOS/FreeRTOS-LTS/tree/202012.00-LTS) release.**
+
 ## Reference example
 
 The example below shows how to use the backoffAlgorithm library to retry a DNS resolution query for `amazon.com`.