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

Author: renovate[bot]

.github/workflows/release.yml

@@ -8,7 +8,7 @@ jobs:
   build-test-publish:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           token: ${{ secrets.GH_TOKEN }}

.github/workflows/test.yml

@@ -4,7 +4,7 @@ jobs:
   build-test:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0