Use correct checklist syntax in PR template

[z4y4ts]

Instead of current renderning like this ⬇️

[ ] Add tests for the change. In general, aim for full test coverage at the Python level. Rust tests are optional.
[ ] Add any appropriate documentation.
[ ] Add a summary of changes to the latest section at the top of CHANGELOG.rst. (If it's not there, add it.)
[ ] Add your name to AUTHORS.rst.
[ ] Run just full-check.

You'll get a nice checklist like this ⬇️

• Add tests for the change. In general, aim for full test coverage at the Python level. Rust tests are optional.
• Add any appropriate documentation.
• Add a summary of changes to the latest section at the top of CHANGELOG.rst. (If it's not there, add it.)
• Add your name to AUTHORS.rst.
• Run just full-check.

Please merge it after #295

[codspeed-hq]

CodSpeed Performance Report

Merging this PR will not alter performance

_{Comparing z4y4ts:patch-2 (c15d84b) with main (53dd737)}

Summary

✅ 26 untouched benchmarks
⏩ 23 skipped benchmarks¹

Footnotes

1. 23 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[Copilot]

Pull request overview

This PR fixes the checklist syntax in the GitHub pull request template to render properly as interactive checkboxes. The change adds the required dash prefix (-) to each checklist item, converting from the incorrect [ ] format to the correct GitHub markdown syntax - [ ].

Changes:

• Updated all 5 checklist items in the PR template to use proper GitHub markdown checklist syntax

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[seddonym]

Nice, thanks!