Update the Protractor migration ReadMe

Author: mdmintz

examples/migration/protractor/ReadMe.md

@@ -2,6 +2,8 @@
 
 🔵 The Protractor/Angular tests from [github.com/angular/protractor/tree/master/example](https://github.com/angular/protractor/tree/master/example) have been migrated to SeleniumBase and placed in this directory.
 
+🔵 Protractor tests that end in ``.spec.js`` will now end in ``_test.py`` for the conversion to SeleniumBase/Python format with pytest auto-discovery.
+
 ✅ Here's a test run with ``pytest`` using ``--reuse-session`` mode and Chromium ``--guest`` mode:
 
 ```bash