Merge pull request #827 from wordpress-mobile/update-pr-template

Update PR template

Author: loremattei

.github/PULL_REQUEST_TEMPLATE.md

@@ -7,4 +7,8 @@
 3. [STEP_3]
 
 ### Review
-@[USER_NAME]
+@[USER_NAME]
+
+Make sure strings will be translated:
+
+- [ ] If there are new strings that have to be translated, I have added them to the client's `strings.xml` as a part of the integration PR.