Add a pull request template

Signed-off-by: Sarita Singh <saritasingh.0425@gmail.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,33 @@
+<!--
+Thank you for contributing to this project! You must fill out the information below before we can review this pull request. By explaining why you're making a change (or linking to a pull request) and what changes you've made, we can triage your pull request to the best possible team for review.
+
+See our CONTRIBUTING guidelines for information how to contribute.
+
+Thanks again!
+-->
+
+### Why:
+
+Closes [issue link]
+
+<!-- 
+- If there's an existing issue for your change, please link to it.
+- If there's _not_ an existing issue, please open one first to make it more likely that this update will be accepted: https://github.com/avinal/xeus-basic/issues/new/choose. -->
+
+### What's being changed:
+
+<!-- Share artifacts of the changes, be they code snippets, GIFs or screenshots; whatever shares the most context. If you made changes to the `content` directory, a table will populate in a comment below with the staging and live article links -->
+
+<!--
+Make sure these boxes are checked before your pull request (PR) is ready to be reviewed and merged. Thanks!
+* [x] - Checked Box
+* [ ] - Unchecked Box
+-->
+
+### Tasks
+
+* [ ] Reviewed contribution guidelines
+* [ ] PR is descriptively titled 📑 and links the original issue above 🔗
+* [ ] Commits are in uniquely-named feature branch and has no merge conflicts 📁
+
+<!-- Don't forget to Signoff -->