Use newest event-function module

See release https://github.com/terraform-google-modules/terraform-google-event-function/releases/tag/v3.0.0

Generate docs again

README.md

@@ -42,12 +42,12 @@ Then perform the following commands on the root folder:
 | bucket\_name | The name to apply to the bucket. Will default to a string of <project-id>-scheduled-function-XXXX> with XXXX being random characters. | `string` | `""` | no |
 | function\_available\_memory\_mb | The amount of memory in megabytes allotted for the function to use. | `number` | `256` | no |
 | function\_description | The description of the function. | `string` | `"Processes log export events provided through a Pub/Sub topic subscription."` | no |
-| function\_docker\_registry | Docker Registry to use for storing the function's Docker images. Allowed values are CONTAINER\_REGISTRY (default) and ARTIFACT\_REGISTRY. | `string` | `"CONTAINER_REGISTRY"` | no |
-| function\_docker\_repository | User managed repository created in Artifact Registry optionally with a customer managed encryption key. If specified, deployments will use Artifact Registry. | `string` | `""` | no |
+| function\_docker\_registry | Docker Registry to use for storing the function's Docker images. Allowed values are CONTAINER\_REGISTRY (default) and ARTIFACT\_REGISTRY. | `string` | `null` | no |
+| function\_docker\_repository | User managed repository created in Artifact Registry optionally with a customer managed encryption key. If specified, deployments will use Artifact Registry. | `string` | `null` | no |
 | function\_entry\_point | The name of a method in the function source which will be invoked when the function is executed. | `string` | n/a | yes |
 | function\_environment\_variables | A set of key/value environment variable pairs to assign to the function. | `map(string)` | `{}` | no |
 | function\_event\_trigger\_failure\_policy\_retry | A toggle to determine if the function should be retried on failure. | `bool` | `false` | no |
-| function\_kms\_key\_name | Resource name of a KMS crypto key (managed by the user) used to encrypt/decrypt function resources. | `string` | `""` | no |
+| function\_kms\_key\_name | Resource name of a KMS crypto key (managed by the user) used to encrypt/decrypt function resources. | `string` | `null` | no |
 | function\_labels | A set of key/value label pairs to assign to the function. | `map(string)` | `{}` | no |
 | function\_max\_instances | The maximum number of parallel executions of the function. | `number` | `null` | no |
 | function\_name | The name to apply to the function | `string` | n/a | yes |