chore: Ignore automatically generated .tfvars files (#9)

.gitignore

@@ -11,8 +11,7 @@ crash.log
 # Ignore any .tfvars files that are generated automatically for each Terraform run. Most
 # .tfvars files are managed as part of configuration and so should be included in
 # version control.
-#
-# example.tfvars
+*.auto.tfvars
 
 # Ignore override files as they are usually used to override resources locally and so
 # are not checked in