Add pull requests template (#1211)

* Create pull_request_template.md

* Update pull_request_template.md

Author: LeftTwixWand

.github/pull_request_template.md

@@ -0,0 +1,11 @@
+**Description**: <Describe your changes here>
+
+**Documentation changes required:** (Y/N) <Please mark if documentation changes are required>
+
+**Added unit tests:** (Y/N) <Please mark if unit tests were added or updated according changes>
+
+**Attached related issue:** (Y/N) <Please add link to related issue here>
+
+**Checklist**:
+- [ ] Version was bumped - please check that version of the extension, task or library has been bumped.
+- [ ] Checked that applied changes work as expected.