fix(release): clean up extra newlines in release notes formatting

[jdx]

Summary

• Fixed the git-cliff template to remove extra blank lines in release notes
• Adjusted bullet point indentation for better formatting
• Cleaned up template control flow to eliminate unnecessary whitespace

Problem

The GitHub releases had ugly formatting with extra blank lines between commits and sections. This was caused by the git-cliff template having improper indentation and an extra blank line before the endif statement in the New Contributors section.

Example of the issue: https://github.com/jdx/mise/releases/tag/v2025.9.1

Solution

Updated the cliff.toml template to:

1. Fix indentation of bullet points (removed extra spaces before -)
2. Removed the blank line before {% endif -%} in the New Contributors section
3. Adjusted the template control flow tags to prevent extra whitespace

Test plan

• The next release should have clean, compact release notes without extra blank lines
• Verify the changelog generation works correctly with git cliff
• Check that both single and multi-commit releases format properly

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

Fixes formatting issues in git-cliff release notes template by removing extra blank lines and adjusting control flow tags to produce cleaner, more compact release notes.

• Removed trailing dash from the opening tag of the New Contributors section conditional
• Added trailing dash to the {% endfor %} tag to eliminate extra whitespace
• Removed blank line before the closing {% endif %} tag

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[github-actions]

Hyperfine Performance

mise x -- echo

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.1 x -- echo	19.7 ± 0.4	18.9	22.4	1.00
mise x -- echo	20.0 ± 0.5	19.1	22.5	1.02 ± 0.03

mise env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.1 env	19.3 ± 0.4	18.3	21.6	1.00
mise env	19.5 ± 0.5	18.5	23.1	1.01 ± 0.03

mise hook-env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.1 hook-env	19.2 ± 0.4	18.1	21.6	1.00
mise hook-env	19.2 ± 0.4	18.1	20.8	1.00 ± 0.03

mise ls

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.1 ls	17.3 ± 0.4	16.3	18.9	1.00
mise ls	17.8 ± 0.8	16.4	29.5	1.03 ± 0.05

xtasks/test/perf

Command	mise-2025.9.1	mise	Variance
install (cached)	169ms	✅ 105ms	+60%
ls (cached)	63ms	63ms	+0%
bin-paths (cached)	68ms	67ms	+1%
task-ls (cached)	484ms	505ms	-4%

✅ Performance improvement: install cached is 60%