chore(deps): update actions/checkout action to v6 (#51)

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

Author: renovate[bot]

.github/workflows/tag.yaml

@@ -13,7 +13,7 @@ jobs:
       new-tag: ${{ steps.ccv.outputs.new-tag }}
       new-tag-version: ${{steps.ccv.outputs.new-tag-version}}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # Need enough history to find the prior release tag
           fetch-depth: 0