chore(deps): update actions/checkout action to v6 (#387)

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
         with:
           persist-credentials: false
       - uses: astral-sh/[email protected]
@@ -59,7 +59,7 @@ jobs:
     needs:
       - lint
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
         with:
           persist-credentials: false
           # fetch the full git history to be able to determine creation dates for pages

.github/workflows/deploy.yml

@@ -19,7 +19,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
         with:
           persist-credentials: true
           # fetch the full git history to be able to determine creation dates for pages