Merge pull request #963 from xmonad/dependabot/github_actions/actions/checkout-6

build(deps): bump actions/checkout from 5 to 6

Author: slotThe

.github/workflows/haskell-ci.yml

@@ -173,7 +173,7 @@ jobs:
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
       - name: checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: source
       - name: initial cabal.project for sdist