Add reference to blog post highlighting Go 1.18 performance improvements (aws#220)

Author: syl-taylor-aws

golang.md

@@ -9,6 +9,8 @@ Here are some noteworthy performance upgrades:
 The main implementation of the Go compiler, [golang/go](https://github.com/golang/go), has improved
 performance on Arm by implementing a new way of passing function arguments and results using registers instead of the stack. This change has been available on x86-64 since 1.17, where it brought performance improvements of about 5%. On Arm this change typically gives even higher performance improvements of 10% or more.
 
+To learn more about the use cases benefiting from Go 1.18's performance improvements, check the blog post: [Making your Go workloads up to 20% faster with Go 1.18 and AWS Graviton](https://aws.amazon.com/blogs/compute/making-your-go-workloads-up-to-20-faster-with-go-1-18-and-aws-graviton/).
+
 ## Go 1.17 \[released 2021/08/16\]
 The main implementation of the Go compiler, [golang/go](https://github.com/golang/go), has improved
 performance for the following standard library packages: