Merge pull request #315 from nishithshah2211/pull_req_template

Create a PULL_REQUEST_TEMPLATE

.github/PULL_REQUEST_TEMPLATE

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+<!-- 
+Please explain WHAT you changed.
+
+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*
+
+If this PR fixes an issue, please reference the issue number as well.
+
+Fill out this form in the body:
+-->
+Closes: #[Issue number]
+
+**Description of the change**:
+
+If you have questions, please send an email [Sendgrid](mailto:[email protected]), or file a Github Issue in this repository.
+