Update the help docs

Author: mdmintz

README.md

@@ -218,6 +218,7 @@ SeleniumBase provides additional Pytest command-line options for tests:
 --start_page=URL  # (The starting URL for the web browser when tests begin.)
 --log_path=LOG_PATH  # (The directory where log files get saved to.)
 --archive_logs  # (Archive old log files instead of deleting them.)
+--slow  # (The option to slow down the automation.)
 --demo  # (The option to visually see test actions as they occur.)
 --demo_sleep=SECONDS  # (The option to wait longer after Demo Mode actions.)
 --highlights=NUM  # (Number of highlight animations for Demo Mode actions.)

help_docs/customizing_test_runs.md

@@ -197,7 +197,8 @@ SeleniumBase provides additional Pytest command-line options for tests:
 --start_page=URL  # (The starting URL for the web browser when tests begin.)
 --log_path=LOG_PATH  # (The directory where log files get saved to.)
 --archive_logs  # (Archive old log files instead of deleting them.)
---demo_mode  # (The option to visually see test actions as they occur.)
+--slow  # (The option to slow down the automation.)
+--demo  # (The option to visually see test actions as they occur.)
 --demo_sleep=SECONDS  # (The option to wait longer after Demo Mode actions.)
 --highlights=NUM  # (Number of highlight animations for Demo Mode actions.)
 --message_duration=SECONDS  # (The time length for Messenger alerts.)