ci: add dependabot (#5435)

Co-authored-by: Shivam Sharma <meshivam81@gmail.com>
Co-authored-by: Sebastian Beltran <bjohansebas@gmail.com>

.github/workflows/dependabot.yml

@@ -0,0 +1,17 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly
+
+  - package-ecosystem: npm
+    directory: /
+    schedule:
+      interval: monthly
+      time: "23:00"
+      timezone: Europe/London
+    open-pull-requests-limit: 10
+    ignore:
+      - dependency-name: "*"
+        update-types: ["version-update:semver-major"]