chore(deps): update actions/checkout action to v6 (#578)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/autofix.yml

@@ -11,7 +11,7 @@ jobs:
   autofix:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: pnpm/action-setup@v4
         with:
           version: 9

.github/workflows/push-to-everything411-repo.yml

@@ -11,7 +11,7 @@ jobs:
     name: Sync to everything411 repo
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           token: ${{ secrets.E411_GITHUB_TOKEN }}
           fetch-depth: 0

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: pnpm/action-setup@v4
         with:
           version: 9
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Restore the cache
         uses: actions/cache@v5
         with: