Input: ps2-gpio - fix typo

"The data line must be sampled" makes much more sense than what was
previously written, and given that "s" and "d" are neighbors on the
QWERTY keybord, it was probably a typo.

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Link: https://lore.kernel.org/r/20250923-ps2-typo-v1-1-03d2468acc32@posteo.net
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/serio/ps2-gpio.c

@@ -50,7 +50,7 @@
  * interrupt interval should be ~60us. Let's allow +/- 20us for frequency
  * deviations and interrupt latency.
  *
- * The data line must be samples after ~30us to 50us after the falling edge,
+ * The data line must be sampled after ~30us to 50us after the falling edge,
  * since the device updates the data line at the rising edge.
  *
  * ___            ______            ______            ______            ___