chore(deps): update actions/checkout action to v6 (#142)

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

Author: renovate[bot]

.github/workflows/deploy.yml

@@ -25,7 +25,7 @@ jobs:
     environment:
       name: release
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: '24.x'
@@ -50,7 +50,7 @@ jobs:
     environment:
       name: release
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: '24.x'