Fix variable reference for Terraform condition (#238)

Author: goruha

README.md.gotmpl

@@ -187,7 +187,7 @@ We literally have <a href="{{ $terraform_modules }}">*hundreds of other terrafor
 ## Usage
 
 {{ (ds "config").usage -}}
-{{- if .is_terraform }}
+{{- if $is_terraform }}
 
 > [!IMPORTANT]
 > In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation
@@ -296,7 +296,7 @@ In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
 **NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!
 
 
-{{- if and (.is_terraform) (file.Exists "test") }}
+{{- if and ($is_terraform) (file.Exists "test") }}
 
 
 ## Running Terraform Tests