Add dependabot

Author: hugovk

.github/dependabot.yml

@@ -0,0 +1,20 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: monthly
+      time: "03:00"
+    open-pull-requests-limit: 10
+    labels:
+      - "changelog: skip"
+      - "dependencies"
+  - package-ecosystem: pip
+    directory: "/"
+    schedule:
+      interval: monthly
+      time: "03:00"
+    open-pull-requests-limit: 10
+    labels:
+      - "changelog: skip"
+      - "dependencies"