dt-bindings: usb: phy: nop: Fix a typo ("specifiy")

Spell it correctly as "specify".
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230129124258.1295503-1-j.neuschaefer@gmx.netSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/usb-nop-xceiv.yaml

@@ -35,7 +35,7 @@ properties:
     maxItems: 1
 
   vbus-regulator:
-    description: Should specifiy the regulator supplying current drawn from
+    description: Should specify the regulator supplying current drawn from
       the VBus line.
     $ref: /schemas/types.yaml#/definitions/phandle