fix: Add --access public flag to npm publish for scoped packages

Scoped packages (@valknarthing/llmx) require the --access public flag
for all npm publish commands, not just the first one.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/rust-release.yml

@@ -526,7 +526,7 @@ jobs:
           )
 
           for tarball in "${tarballs[@]}"; do
-            npm publish "${GITHUB_WORKSPACE}/dist/npm/${tarball}" "${tag_args[@]}"
+            npm publish "${GITHUB_WORKSPACE}/dist/npm/${tarball}" --access public "${tag_args[@]}"
           done
 
   update-branch: