ci(docs): use pnpm_config_ignore_scripts env (dlx rejects the flag)

`pnpm dlx --ignore-scripts ...` errors with "Unknown option: 'ignore-
scripts'" — pnpm only honors the flag on `pnpm install`. Set the same
behavior via the `pnpm_config_ignore_scripts=true` env var, which pnpm
reads at runtime. Preserves the postinstall-blocking guarantee against
malicious transitives without changing the command name.

Author: pfe-nazaries

.github/workflows/markdown-lint.yml

@@ -53,4 +53,8 @@ jobs:
 
       - name: Run markdownlint
         # Pin must match .pre-commit-config.yaml so prek and CI behave identically.
-        run: pnpm dlx --ignore-scripts markdownlint-cli@0.45.0 '**/*.md'
+        # pnpm dlx doesn't accept --ignore-scripts as a flag; the env var
+        # disables postinstall scripts on transitives the same way.
+        env:
+          pnpm_config_ignore_scripts: 'true'
+        run: pnpm dlx markdownlint-cli@0.45.0 '**/*.md'