Only if the pitch increases faster than the airplane's trajectory changes. Then two things happen - the angle of attack and the g-loading on the wing both increase. Only the second - increased loading - raises the stall speed. It is not the pitch angle that increased the stall speed.

No different than the accelerated stalls that every student pilot learns about and executes except the increased g-loading is due to rapid pitch up instead of tightening the turn in level flight.

Jim