Add Dependabot config (#147)

GUS-W-21735541.

Signed-off-by: Ed Morley <501702+edmorley@users.noreply.github.com>

Author: edmorley

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    labels:
+      - "dependencies"
+      - "github actions"
+      - "skip changelog"