chore: limit dependabot to direct dependencies only

Agent-Logs-Url: https://github.com/Nosto/nosto-react/sessions/dfe23f81-e2eb-4e16-8597-79dd81aca5c2

Co-authored-by: timowestnosto <13622115+timowestnosto@users.noreply.github.com>

Author: Copilot

.github/dependabot.yml

@@ -2,6 +2,8 @@ version: 2
 updates:
   - package-ecosystem: "npm"
     directory: "/"
+    allow:
+      - dependency-type: "direct"
     schedule:
       interval: "weekly"
     commit-message: