chore(ci): bump actions/checkout from v4 to v7

.github/dependabot.yml

@@ -1,6 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"

.github/workflows/dependabot-auto-merge.yml

@@ -1,24 +0,0 @@
-name: Dependabot auto-merge
-
-on:
-  pull_request_target:
-    branches:
-      - master
-      - main
-    types:
-      - opened
-
-permissions:
-  pull-requests: write
-  contents: write
-
-jobs:
-  enableAutoMerge:
-    runs-on: ubuntu-latest
-    if: github.event.pull_request.user.login == 'dependabot[bot]'
-    steps:
-      - name: Enable auto-merge for Dependabot PRs
-        run: gh pr merge --auto --merge "$PR_URL"
-        env:
-          PR_URL: ${{ github.event.pull_request.html_url }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}