Update devcontainer.json - Added TFDocs

Added TFDocs support

Author: lukemurraynz

.devcontainer/devcontainer.json

@@ -26,10 +26,11 @@
         // Adds and configures Terraform with specific version, TFLint, and Terragrunt.
   "ghcr.io/prulloac/devcontainer-features/pre-commit:1.0.3": {},
     // Adds and configures Terraform with specific version, TFLint, and Terragrunt.
-    "ghcr.io/devcontainers/features/terraform:1": {
+    "ghcr.io/devcontainers/features/terraform:1.3.8": {
       "version": "latest", // Specifies the version of Terraform to install.
       "tflint": "latest", // Specifies the version of TFLint to install.
-      "terragrunt": "latest" // Specifies the version of Terragrunt to install.
+      "terragrunt": "latest", // Specifies the version of Terragrunt to install.
+      "installTerraformDocs": true
     }
   },
   "postCreateCommand": "pre-commit install",