Add accessibility note to PR template

.github/pull_request_template.md

@@ -5,7 +5,13 @@
 
 ## How was this change tested? 🤨
 
+⚡ ⚠ If this change has cross service impact, or if it changes code used internally for cloud replication, **_run [integration test preassembly_image_accessioning_spec.rb](https://github.com/sul-dlss/infrastructure-integration-test/blob/main/spec/features/preassembly_image_accessioning_spec.rb) against stage as it tests preservation_**, and/or test in stage environment, in addition to specs. The main classes relevant to replication are `ZipmakerJob`, `DeliveryDispatcherJob`, `*DeliveryJob`, `ResultsRecorderJob`, and `DruidVersionZip`; [see here for overview diagram of replication pipeline](https://github.com/sul-dlss/preservation_catalog/blob/main/app/jobs/README.md).⚡
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+
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+# Does your change introduce accessibility violations? 🩺
+
+⚡ ⚠ Please ensure this change does not introduce accessibility violations (at the WCAG A or AA conformance levels); if it does, include a rationale. See the [Infrastructure accessibility guide](https://github.com/sul-dlss/DeveloperPlaybook/blob/main/best-practices/infra-accessibility.md) for more detail. ⚡
 
 
 
-⚡ ⚠ If this change has cross service impact, or if it changes code used internally for cloud replication, **_run [integration test preassembly_image_accessioning_spec.rb](https://github.com/sul-dlss/infrastructure-integration-test/blob/main/spec/features/preassembly_image_accessioning_spec.rb) against stage as it tests preservation_**, and/or test in stage environment, in addition to specs. The main classes relevant to replication are `ZipmakerJob`, `DeliveryDispatcherJob`, `*DeliveryJob`, `ResultsRecorderJob`, and `DruidVersionZip`; [see here for overview diagram of replication pipeline](https://github.com/sul-dlss/preservation_catalog/blob/main/app/jobs/README.md).⚡