Update pull_request_template.md

updated to use PR template from animal-ai-unity GitHub for coherency

.github/pull_request_template.md

@@ -1,13 +1,16 @@
+### PR Description
+
+_Why was this PR produced? Give detailed reasons for your PR._
+
 ### Proposed change(s)
-_i.e. what this PR does, and why it should be merged._
 
-### Useful links (Github issues, feature requests, etc.)
-_i.e. any link that will be useful to understanding this PR?_
+_Describe the changes made in this PR._
 
+### Useful links (Github issues, discussion threads, etc.)
 
-### Types of change(s)
-_i.e. what does this PR primarily do? Is it a combination of changes like below?_
+_i.e. fixed issue #999._
 
+### Types of change(s)
 - [ ] Bug fix
 - [ ] New feature
 - [ ] Code refactor
@@ -16,19 +19,11 @@ _i.e. what does this PR primarily do? Is it a combination of changes like below?
 - [ ] Other (please describe)
 
 ### Checklist
-_i.e. make sure to highlight all that apply to this PR._
-
-- [ ] Checked and verified that the new code is working as intended and is not breaking anything else (all tests under `config-tests` directory in Unity is passed)
-    - [ ] I added my own tests and dumped them in the `config-tests` directory in Unity (if applicable, please name them here)
+- [ ] Added tests that prove my fix is effective or that my feature works
 - [ ] Updated the changelog (if applicable)
-- [ ] Updated the documentation (if applicable, such as `README.md` or `YAML-Config-Syntax.md`)
+- [ ] Updated the documentation (if applicable)
 - [ ] Updated the migration guide (if applicable)
 
-### Other comments
-_...anything you'd like to add which could be important to this PR._
-
+### Other comments (if any)
 
 ### Screenshots (if any)
-_i.e. you've created a new game object and so this could be a nice chance to showcase it._
-
-