update pull_request_template.md

Author: Stepami

.github/pull_request_template.md

@@ -1,21 +1,8 @@
-### Description
-<!--- Describe your changes in detail -->
-<!--- Why is this change required? What problem does it solve? -->
+**Is your pull request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
 
+**Describe the solution you've done**
+Key points of your tech and arch decisions.
 
-### Related Issues
-<!--- If it fixes an open issue, please link to the issue here. -->
-
-
-### References
-<!--- References would be helpful to understand the changes. -->
-<!--- References can be books, links, etc. -->
-
-
-### Checklist:
-<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
-<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
-- [ ] I have followed the [contribution guidelines](../CONTRIBUTING.md) and code style for this project.
-- [ ] I have added tests covering my contributions.
-- [ ] I have updated the documentation accordingly.
-- [ ] I have added corresponding labels with respect to the part of the interpreter i've worked on.
+**Related Issues**
+If it fixes an open issue, please link to the issue here.