ptest-runner: correct PV from 2.5.1 to 2.4.5.1
2.4.5.1 is an actual version, 2.5.1 was a typo mistake.
That merged less than an hour ago, so no one should
trip over version going backwards hopefully.
(From OE-Core rev: d5e0f51bccae7410b10c98a93fa5853155c2f59e)
Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>