Generated markdown is invalid according to markdownlint

[brodock]

Describe the bug
Running the patchChangelog, removes the empty line between the Level 2 and Level 3 Headers and any list item present there, which is considered invalid by markdownlint.

To Reproduce

1. Include items in the unreleased section.
2. Run patchChangelog task
3. Run markdownlint against CHANGELOG.md

This is an example of the violations:

CHANGELOG.md:15 MD022/blanks-around-headings/blanks-around-headers Headings should be surrounded by blank lines [Expected: 1; Actual: 0; Below] [Context: "### Changed"]
CHANGELOG.md:16 MD032/blanks-around-lists Lists should be surrounded by blank lines [Context: "- Some content you added to the Unreleased section"]

Expected behavior
The generated Markdown should include an empty line after the Level 3 headers. This is enough to comply with both violations.

Environment:

• OS: macOS Ventura 13.5
• Gradle Changelog Plugin Version: 2.1.2
• Gradle Version: 8.2.1

Additional context
Add any other context about the problem here.

[hsz]

Thanks for reporting, Gabriel!
Since the next release, headings and lists will be surrounded with blank lines.