Update 'Environment variables' sections in README

Author: jonavellecuerdo

.github/pull-request-template.md

@@ -25,5 +25,5 @@ YES | NO
 - [ ] The commit message is clear and follows our guidelines (not just this PR message)
 - [ ] There are appropriate tests covering any new functionality
 - [ ] The provided documentation is sufficient for understanding any new functionality introduced
-- [ ] Any manual tests have been performed and verified
+- [ ] Any manual tests have been performed **or** provided examples verified
 - [ ] New dependencies are appropriate or there were no changes