Update go version in readme (#100)

Author: deanhuynh

README.md

@@ -6,7 +6,7 @@ This project is currently in **PILOT**.
 ## Requirements
 
 - [Terraform](https://www.terraform.io/downloads.html) >= 1.0
-- [Go](https://golang.org/doc/install) >= 1.19
+- [Go](https://golang.org/doc/install) >= 1.21
 
 ## Building The Provider