Create pull_request_template.md

Author: sarthak-sehgal

.github/pull_request_template.md

@@ -0,0 +1,12 @@
+## Description
+Describe the changes made and why they were made instead of how they were made.
+
+## Related issues and discussion
+#{Issue Number}
+
+## Screenshots, if any
+
+## Checklist
+Please make sure these boxes are checked before submitting your pull request - thanks!
+
+- [ ] Run the tests