chore: update actions/checkout to v6.0.2 and clean up renovate.json

Author: FantomStudy

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6.0.1
+        uses: actions/checkout@v6.0.2
 
       - name: Bun setup
         uses: oven-sh/setup-bun@v2

renovate.json

@@ -1,5 +1,4 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["config:base"],
-  "dependencyDashboard": true
+  "extends": ["config:base"]
 }