workflows: Add setup-terraform before doc generation step (hashicorp#375)

Author: austinvalle

.github/workflows/test.yml

@@ -33,6 +33,12 @@ jobs:
       with:
         version: latest
 
+    # We need the latest version of Terraform for our documentation generation to use
+    - name: Set up Terraform
+      uses: hashicorp/setup-terraform@b9cd54a3c349d3f38e8881555d616ced269862dd # v3.1.2
+      with:
+        terraform_wrapper: false
+
     - name: Generate
       run: make generate