Version 4.16.0

What's Changed

• docs: Update Relay Kit description by @germartinez in #615
• fix(safe-core-sdk). init method docs by @yagopv in #611
• docs: Add migration guide from v4 to v5 to protocol-kit docs by @DaniSomoza in #613
• fix: Update code formatting by @germartinez in #612

Full Changelog: v4.15.0...v4.16.0