Update pull_request_template.md

Author: warm-coolguy

.github/pull_request_template.md

@@ -4,4 +4,16 @@ _Summarization of the changes in a short and concise sentence._
 
 ## Instructions for local reproduction and review
 
+## Pull Request Checklist (for Reviewee)
+
+- [ ] Changelogs are maintained
+- [ ] Functionality has been tested in Firefox, Chrome, Safari
+- [ ] Functionality has been tested on a smartphone
+- [ ] Functionality has been tested with 200% screen zoom
+- [ ] Screenreader functionality has been manually tested with NVDA
+
+UI has been tested in the following tools regarding accessibility (only regarding functionality affected in this PR)
+  - [ ] Chrome Lighthouse
+  - [ ] Firefox Accessibility
+
 ## Relevant tickets, issues, et cetera