Add line breaks for author legibility

.github/pull_request_template.md

@@ -1,15 +1,20 @@
 ## Closes issue
+
 Replace `ISSUE_NUMBER` with the issue number that your pull request fixes. Then GitHub will link and automatically close the related issue.
+
 - [ ] Closes #ISSUE_NUMBER
 
 ## Description
+
 Write a description of the fixes or improvements.
 
 ## Checklist
+
 - [ ] Added or updated tests if applicable.
 - [ ] All tests pass locally. See https://icalendar.readthedocs.io/en/latest/install.html#running-tests.
 - [ ] Added entry to `CHANGES.rst`.
 - [ ] Added myself to `docs/credits.rst`.
 
 ## Additional information
-Upload screenshots, videos, links to documentation, or any other relevant information.
+
+Upload screenshots, videos, links to documentation, or any other relevant information.