Fix PR template not autopopulating

[nglaser3]

Summary of changes

This PR fixes the pull request template not auto-populating when creating a PR. The problem (I think) was because I put the file in the wrong place originally, and included yaml front matter that is only meaningful with multiple templates.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Organization and beautification (changes which improve readability and/or accessibility)

Developer Checklist

• I have read the contributing guide.
• My code follows the code style of this project.

Associated Issues and PRs

• closes [Feature] Configure auto-generation of the PR description to be compatible with our PR template #379
• related to #

Associated Developers

• Dev: @melekderman

[nglaser3]

@melekderman @ilhamv I am unsure how to test this to verify it works properly before actually merging, but for what it is worth I think this is correct now?

[ilhamv]

Thanks @nglaser3 !