Update PULL_REQUEST_TEMPLATE

Author: Matt Bernier

.github/PULL_REQUEST_TEMPLATE

@@ -1,29 +1,24 @@
-<!-- 
-Please explain WHAT you changed and WHY.
+<!--
+We appreciate the effort for this pull request but before that please make sure you read the contribution guidelines given above, then fill out the blanks below.
 
-The title should be descriptive, for example:
 
-* *Fixed a typo in the apikeypermissions.md page*
-* *Added the maximum number of domain whitelabels you can create to domains.md*
-* *Fixing the number of days a batch id is valid in scheduling_parameters.md*
-
-Fill out this form in the body:
--->
-
-**Description of the change**:
-**Reason for the change**:
-**Link to original source**:
-<!-- 
-If this pull request closes an issue, add in the issue number here 
+Please enter each Issue number you are resolving in your PR after one of the following words [Fixes, Closes, Resolves]. This will auto-link these issues and close them when this PR is merged!
+e.g. 
+Fixes #1
+Closes #2
 -->
-Closes #
+# Fixes # 
 
 ### Checklist
+- [ ] I have made a material change to the repo (functionality, testing, spelling, grammar)
+- [ ] I have read the [Contribution Guide] and my PR follows them.
+- [ ] I updated my branch with the master branch.
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] I have added necessary documentation about the functionality in the appropriate .md file
+- [ ] I have added in line documentation to the code I modified
 
-Make sure all of these items are complete, or else the PR will be ineligible for a code review.
+### Short description of what this PR does:
+- 
+- 
 
-- [ ] Code passes all existing [tests](https://github.com/sendgrid/csharp-http-client/tree/master/UnitTest)
-- [ ] Any new functionality added includes new unit tests
-- [ ] Create or update example code to show the new functionality in action.
-- [ ] All code, branch, and git naming and style conventions are followed (see [`CONTRIBUTING.md`](https://github.com/sendgrid/csharp-http-client/blob/master/CONTRIBUTING.md#style-guidelines--naming-conventions))
-- [ ] Feature branch has been rebased off of the latest `master` branch. ( see [`CONTRIBUTING.md`](https://github.com/sendgrid/csharp-http-client/blob/master/CONTRIBUTING.md#creating-a-pull-request)).
+If you have questions, please send an email to [Sendgrid](mailto:[email protected]), or file a Github Issue in this repository.