fix: bump default gcloud version (#337)

modules/cloudbuild/README.md

@@ -61,7 +61,7 @@ Functional examples and sample Cloud Build definitions are included in the [exam
 | folder\_id | The ID of a folder to host this project | `string` | `""` | no |
 | force\_destroy | If supplied, the logs and artifacts buckets will be deleted even while containing objects. | `bool` | `false` | no |
 | gar\_repo\_name | Custom name to use for GAR repo. | `string` | `""` | no |
-| gcloud\_version | Default gcloud image version. | `string` | `"388.0.0-slim"` | no |
+| gcloud\_version | Default gcloud image version. | `string` | `"504.0.0-slim"` | no |
 | group\_org\_admins | Google Group for GCP Organization Administrators | `string` | n/a | yes |
 | impersonate\_service\_account | The service account to impersonate while running the gcloud builds submit command. | `string` | `""` | no |
 | org\_id | GCP Organization ID | `string` | n/a | yes |

modules/cloudbuild/variables.tf

@@ -158,7 +158,7 @@ variable "terraform_version" {
 variable "gcloud_version" {
   description = "Default gcloud image version."
   type        = string
-  default     = "388.0.0-slim"
+  default     = "504.0.0-slim"
 }
 
 variable "terraform_version_sha256sum" {