Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/tag.yaml

@@ -13,7 +13,7 @@ jobs:
     permissions:
       contents: write
     steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
       with:
         fetch-depth: '0'
     - name: Bump version and push tag