add note for pull request about update develop branch

Author: roramirez

Diff for: .github/PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,13 @@
 > Please send your pull requests the develop branch.
 > Don't forget to add the change to CHANGELOG.md.
 
+**Note**: Sometimes the development moves very fast. It is highly
+recommended that you update your branch of `develop` before creating a
+pull request to send us your changes. This makes everyone's lives
+easier (including yours) and helps us out on the development team.
+Thanks!
+
+
 * Does the pull request solve a **related** issue?
 * If so, can you reference the issue?
 * What does the pull request accomplish? Use a list if needed.