add dependabot

Author: lukasj

.github/workflows/dependabot.yml

@@ -0,0 +1,36 @@
+#
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# This program and the accompanying materials are made available under the
+# terms of the Eclipse Public License v. 2.0 which is available at
+# http://www.eclipse.org/legal/epl-2.0,
+# or the Eclipse Distribution License v. 1.0 which is available at
+# http://www.eclipse.org/org/documents/edl-v10.php.
+#
+# SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
+#
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    groups:
+      actions-dependencies:
+        patterns:
+          - "*"
+
+  - package-ecosystem: "maven"
+    directories:
+      - "/"
+      - "spec"
+    schedule:
+      interval: "daily"
+    groups:
+      maven-plugins:
+        patterns:
+          - "*:*-plugin"
+      dependencies:
+        patterns:
+          - "*"