Update pull_request_template.md

Author: jo-elimu

.github/pull_request_template.md

@@ -14,6 +14,19 @@
 <!-- How can the reviewer verify the functionality or fix introduced by this PR? Please provide steps. -->
 * 
 
+### Regression Tests
+<!-- Did you verify that your changes didn't break existing functionality? -->
+- [ ] I tested my changes on Android 15 (API 35)
+- [ ] I tested my changes on Android 14 (API 34)
+- [ ] I tested my changes on Android 13 (API 33)
+- [ ] I tested my changes on Android 12L (API 32)
+- [ ] I tested my changes on Android 12 (API 31)
+- [ ] I tested my changes on Android 11 (API 30)
+- [ ] I tested my changes on Android 10 (API 29)
+- [ ] I tested my changes on Android 9 (API 28)
+- [ ] I tested my changes on Android 8.1 (API 27)
+- [ ] I tested my changes on Android 8.0 (API 26)
+
 ### Screenshots
 <!-- If this PR affects the UI, please include before/after screenshots demonstrating the change(s). -->
 *