Comment out info lines of pull request template

[carreter]

Changes in this PR

Lines providing info on how to fill out the pull request are now commented out.

Why are you making these changes?

Will make things look neater.

Are any changes breaking? (IMPORTANT)

No

Pre-merge checklist

All of these must be satisfied before this PR is considered
ready for merging. Mergeable PRs will be prioritized for review.

• New packages/exported functions have docstrings.
• New/changed functionality is thoroughly tested.
• New/changed functionality has a function giving an example of its usage in the associated test file. See primers/primers_test.go for what this might look like.
• Changes are documented in CHANGELOG.md in the [Unreleased] section.
• All code is properly formatted and linted.
• The PR template is filled out.