chore(deps): update actions/checkout action to v6 (#68)

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

Author: renovate[bot]

.github/workflows/addon-news.yml

@@ -10,7 +10,7 @@ jobs:
     container: ubuntu:24.04
     steps:
       - run: apt-get update && apt-get install -y git xmlstarlet pandoc
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - run: git config --global --add safe.directory /__w/plugin.video.haru/plugin.video.haru