feat: disable shellcheck again

This triggers a lot of errors in the `run:` steps, but this does not run reliably for all files, making the results unreliably. Also, some of reported errors are false positives, caused by how actionlint invokes shellcheck on the commands.

.github/workflows/lint-workflows.yml

@@ -22,4 +22,4 @@ jobs:
       - name: Run actionlint
         uses: docker://rhysd/actionlint:latest
         with:
-          args: -color -pyflakes=
+          args: -color -pyflakes= -shellcheck=