nanvix-zutil v0.8.0

What's Changed

• [build] Centralize release logic in scripts/release.py by @ppenna in #165
• [build] Make --with-docker IMAGE required for setup, remove default Docker image by @ppenna in #164
• [ci] Fix release workflow detached HEAD failure by @ppenna in #166
• [build] Fix duplicate release asset by @ppenna in #167

Full Changelog: v0.7.48...v0.8.0