feat: Add Terraform dependabot configuration for weekly updates

Author: incubator4

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: terraform
+    directory: /
+    schedule:
+      interval: weekly
+  - package-ecosystem: terraform
+    directories:
+      - /modules/ethereum
+    schedule:
+      interval: weekly

modules/ethereum/variable.tf

@@ -133,7 +133,7 @@ variable "node_register" {
 
 variable "node_register_config" {
   type = object({
-    maintainer = object({
+    operator = object({
       evm_address = string
       signature   = string
     })
@@ -143,4 +143,4 @@ variable "node_register_config" {
     })
   })
   description = "The register config for the node"
-}
+}