Update Terraform google to ~> 6.50

Author: renovate[bot]

packages/airnode-deployer/terraform/gcp/providers.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     google = {
       source  = "hashicorp/google"
-      version = "~> 6.19"
+      version = "~> 6.50"
     }
   }