Improve PR template. Add accessibility testing information.

Author: joshua-scott

.github/pull_request_template.md

@@ -1,13 +1,33 @@
-Link to ticket: JIRA-123
+## Link to ticket:
 
-Changes proposed in this PR:
-- change a
-- change b
+[Add link to ticket]
 
-How to test:
-1. do this
-1. then do that
-1. you should now see xyz
+## Link to feature environment:
 
-Link to feature environment:
-<add silta url here>
+[Add link to feature environment]
+
+## Changes proposed in this PR:
+
+[Explain what was done and why. You can also add screenshots here if it helps.]
+
+## How to test:
+
+1. Do this
+2. Then do that
+
+## Best practices:
+
+<details>
+<summary><h3>Accessibility:</h3></summary>
+<p>
+This project must support WCAG accessibility level AA <em>(edit this according to the requirements of your project)</em>. To ensure this standard is met, remember to:
+
+- Perform automated checks using a tool such as Wave, Lighthouse, or SiteImprove.
+- Test keyboard navigation: are all parts of the UI navigable using only the keyboard? Is the tab order logical? Can popups, menus etc be dismissed with the escape key?
+- Test with a screen reader such as VoiceOver (macOS), NVDA (Windows), or Orca (Linux).
+- Test responsiveness, scaling and text reflow.
+- Make sure no accessibility issues exist on either desktop or mobile views.
+
+You can find further testing instructions in the Accessibility Testing Cheat Sheet on Intra.
+</p>
+</details>