FIXME UP, CI: take actionlint from nix-shell

.github/workflows/actionlint.yml

@@ -25,11 +25,6 @@ jobs:
       # Make the Nix environment available to next steps
       - uses: rrbutani/use-nix-shell-action@v1
 
-      - name: Install actionlint
-        run: |
-          # Puts the "actionlint" binary in the working folder
-          bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
-
       - name: actionlint
         run: |
           for file in $(git ls-files ".github/workflows/*.y*ml")
@@ -38,7 +33,7 @@ jobs:
             then
               echo "⚠️ $file is ignored from actionlint's verifications. Please consider fixing it."
             else
-              echo "./actionlint $file"
-              ./actionlint "$file"
+              echo "actionlint $file"
+              actionlint "$file"
             fi
           done