fix: Add support for 3.x provider to beta subnets module (#194)

Author: morgante

modules/subnets-beta/versions.tf

@@ -17,6 +17,6 @@
 terraform {
   required_version = "~> 0.12.6"
   required_providers {
-    google-beta = "~> 2.19.0"
+    google-beta = ">= 2.19.0, <4.0.0"
   }
 }