Update PR template to be PCI compliant

Author: Maed223

.github/pull_request_template.md

@@ -49,3 +49,17 @@ $ TFE_ADDRESS="https://example" TFE_TOKEN="example" go test ./... -v -run TestFu
 
 ...
 ```
+
+## Rollback Plan
+
+<!--
+Please outline a plan in the event changes need to be rolled back
+
+Example: If a change needs to be reverted, we will roll out an update to the code within 7 days.
+-->
+
+## Changes to Security Controls
+
+<!--
+Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.
+-->