fix(ci): remove broken npm upgrade step in dev-publish

[samuelds]

Summary

• Remove the `npm install -g npm@latest` step that fails with `MODULE_NOT_FOUND: promise-retry` on Node 22.22.2.
• `actions/setup-node@v5` already installs npm 10.9.7 which supports OIDC Trusted Publishing natively.
• Same fix already applied on marketplace via PR #208.

Why

• Detected via smoke test on chore(brick-convert): smoke test release pipeline marketplace#207.
• Step was redundant and blocking the dev-publish workflow on develop pushes.

Impact

• Dev-publish workflow on develop branch will succeed instead of failing on this step.
• No functional change to the publish itself (snapshot dev versions).

🤖 Generated with Claude Code