chore(deps): update actions/checkout action to v6 (#1854)

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

Author: renovate[bot]

.github/workflows/code-references.yml

@@ -13,7 +13,7 @@ jobs:
     name: LaunchDarkly Code References
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 11
       - name: LaunchDarkly Code References