fix: ensuring the name of the lambda is passed to the module inputs

locals.tf

@@ -13,6 +13,7 @@ locals {
   ## The configuration for slack notifications if enabled 
   slack = local.enable_slack ? {
     channel     = var.notifications.slack.channel
+    lambda_name = var.notifications.slack.lambda_name
     secret_name = var.notifications.slack.secret_name
     username    = var.notifications.slack.username
     webhook_url = var.notifications.slack.webhook_url