Add tests question to MR template

Description

• MR template has a checklist, this adds "I added tests where appropriate." to the checklist
• Also (since I just thought of it) expands the 'types of changes' to include some new categories (docs, style, refactor, test, and chore)

How Has This Been Tested?

N/A

Relevant Documents (optional)

N/A

Types of changes

• Chore (no code changes)

Checklist:

N/A

Reviewers

@calibration

added Waiting for review label

added 1 commit

• c8ff6a47 - Update default.md

Compare with previous version

LGTM

LGTM

merged

mentioned in commit 0096dd09

removed Waiting for review label