Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/badges.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout 🛎
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Update version badges 🏷
         run: npx -p dependency-version-badge update-badge cypress

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Cypress run
         uses: cypress-io/github-action@v4
         with: