fix: Change default storage class to STANDARD (#137)

BREAKING CHANGE: The default storage class has been changed from `MULTI_REGIONAL` to `STANDARD`. This new default is [recommended](https://cloud.google.com/storage/docs/storage-classes#standard) and can be used for multi-regional storage.

README.md

@@ -74,7 +74,7 @@ Functional examples are included in the
 | set\_storage\_admin\_roles | Grant roles/storage.admin role to storage\_admins and bucket\_storage\_admins. | `bool` | `false` | no |
 | set\_viewer\_roles | Grant roles/storage.objectViewer role to viewers and bucket\_viewers. | `bool` | `false` | no |
 | storage\_admins | IAM-style members who will be granted roles/storage.admin on all buckets. | `list(string)` | `[]` | no |
-| storage\_class | Bucket storage class. | `string` | `"MULTI_REGIONAL"` | no |
+| storage\_class | Bucket storage class. | `string` | `"STANDARD"` | no |
 | versioning | Optional map of lowercase unprefixed name => boolean, defaults to false. | `map(bool)` | `{}` | no |
 | viewers | IAM-style members who will be granted roles/storage.objectViewer on all buckets. | `list(string)` | `[]` | no |
 | website | Map of website values. Supported attributes: main\_page\_suffix, not\_found\_page | `map(any)` | `{}` | no |

variables.tf

@@ -44,7 +44,7 @@ variable "location" {
 variable "storage_class" {
   description = "Bucket storage class."
   type        = string
-  default     = "MULTI_REGIONAL"
+  default     = "STANDARD"
 }
 
 variable "force_destroy" {