fix: run dependabot on reusuable workflows (#1416)

Author: onerandomusername

.github/dependabot.yaml

@@ -4,7 +4,9 @@
 version: 2
 updates:
   - package-ecosystem: "github-actions"
-    directory: "/"
+    directories:
+      - "/"
+      - "/.github/actions/*"
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 1