Valentin's suggestion to simplify installing actionlint

Co-authored-by: Valentin Gagarin <[email protected]>

Author: smelc

.github/workflows/actionlint.yaml

@@ -24,10 +24,6 @@ jobs:
         with:
           persist-credentials: false # Because installing actionlint runs arbitrary code, we discard the GITHUB_TOKEN after this step
       # Taken from https://github.com/rhysd/actionlint/blob/v1.7.7/docs/usage.md#use-actionlint-on-github-actions
-      - name: Download actionlint
-        id: get_actionlint
-        run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
-        shell: bash
       - name: Check workflow files
-        run: ${{ steps.get_actionlint.outputs.executable }}
-        shell: bash
+        run: nix-shell -p actionlint --run actionlint
+