Fix doc for retry behaviour doubling wait interval
Fix doc for retry behaviour doubling wait interval

See https://github.com/Codeception/Codeception/blob/3.0/src/Codeception/Lib/Actor/Shared/Retry.php:
"Interval will be doubled on each unsuccessful execution."
Codeception/base,Naktibalda/Codeception,Naktibalda/Codeception,Codeception/Codeception,Codeception/base,Naktibalda/Codeception,Codeception/Codeception,Codeception/base