Update README to reflect that HCL 2 is not experimental anymore
Update README to reflect that HCL 2 is not experimental anymore

hashicorp/hcl,strivecast/hcl,hashicorp/hcl,hashicorp/hcl,hashicorp/hcl,strivecast/hcl,strivecast/hcl,strivecast/hcl,hashicorp/hcl,strivecast/hcl