pin terraform version

ci-scripts/generate-pipeline.sh

@@ -13,7 +13,7 @@ for dir in templates/*; do
 
 validate_${name}:
   stage: validate
-  image: hashicorp/terraform:latest
+  image: hashicorp/terraform:1.12
   script:
     - terraform -chdir=$dir init -backend=false
     - terraform -chdir=$dir validate