README.md: correct provider organization & missing repository name
README.md: correct provider organization & missing repository name

btobolaski/terraform-provider-linode,hashicorp/terraform-provider-template,terraform-providers/terraform-provider-template,btobolaski/terraform-provider-linode,terraform-providers/terraform-provider-template,hashicorp/terraform-provider-template,hashicorp/terraform-provider-template,terraform-providers/terraform-provider-template,btobolaski/terraform-provider-linode