#162808352 Rename PR Template as per Github Standards.

[ghost]

What does this PR do?

This PR renames the Pull Request Template to reflect recommended Github Standards.

Description of Task to be completed?

• Rename PR Template

How should this be manually tested?

This will take effect when the next PR is raised.

Any background context you want to provide?

What are the relevant pivotal tracker stories?

#162808352

Screenshots (if appropriate)

Questions:

Checklist:

• My code follows the style guidelines of this project
• At least 2 people have reviewed my PR
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• My PR has one commit.