chore: disable dependabot (#1562)

We are now using renovate. This change also fixes that configuration.

Author: zerok

.github/dependabot.yml

@@ -19,8 +19,6 @@
         "RENOVATE_VERSION:\\s*(?<depName>renovate)@(?<currentValue>[^\\s]+)",
       ],
       datasourceTemplate: "npm",
-      // Run the custom matcher on early Monday mornings (UTC)
-      schedule: "* 0-4 * * 1",
     },
   ],
   dependencyDashboard: false,
@@ -35,8 +33,6 @@
   "github-actions": {
     managerFilePatterns: [".github/workflows/docker-build-push-multiarch.yml"],
   },
-  globalExtends: [":pinDependencies", "config:best-practices"],
-  onboarding: false,
   osvVulnerabilityAlerts: true,
   packageRules: [
     {
@@ -66,10 +62,13 @@
       schedule: "* 0-4 * * 1",
       matchPackageNames: ["ghcr.io/renovatebot/renovate"],
     },
+    {
+      schedule: "* 0-4 * * 1",
+      matchDepNames: ["renovate"],
+    },
   ],
   platformCommit: "enabled",
   rebaseWhen: "behind-base-branch",
-  requireConfig: "optional",
   vulnerabilityAlerts: {
     automerge: true,
     enabled: true,