chore(deps): update actions/checkout action to v6 (#8)

Co-authored-by: org-internal-bot[bot] <192104158+org-internal-bot[bot]@users.noreply.github.com>

Author: org-internal-bot[bot]

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     # - fewer available => longer "queued times"
     runs-on: "ubuntu-latest"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: mozilla-actions/[email protected]
       - uses: jdx/mise-action@v3
       - run: mise run --jobs 1 :ci

.github/workflows/renovate.yml

@@ -30,7 +30,7 @@ jobs:
           app-id: ${{ secrets.INTBOT_APP_ID }}
         #   owner: ${{ github.repository_owner }}
         #   repositories: ${{ github.repository }}
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           token: ${{ steps.get_token.outputs.token }}
           ref: ${{ github.head_ref }}