docs: update changelog for release v2; fix nested lists in online doc

[danceratopz]

🗒️ Description

1. Clean-up the changelog ready for release v2.0.0.
2. Fix formatting of nested lists in online doc (this problem: Incorrect rendering of nested lists mkdocs/mkdocs#545)

🔗 Related Issues

None

✅ Checklist

• All: Set appropriate labels for the changes.
• All: Considered squashing commits to improve commit history.
• All: Added an entry to CHANGELOG.md.
• All: Considered updating the online docs in the ./docs/ directory.
• Tests: Included the type and version of evm t8n tool used to locally execute test cases: e.g., ref with commit hash or geth 1.13.1-stable-3f40e65.
• Tests: Ran mkdocs serve locally and verified the auto-generated docs for new tests in the Test Case Reference are correctly formatted.

[marioevz]

LGTM!