Update I2CTarget.c

Modification of the doc text of function request().

1) The timout parameter is a keyword-only argument; so Added '*,' in the function signature;
2) for parameter timeout an integer is expected, not a float.

Author: PaulskPt

shared-bindings/i2ctarget/I2CTarget.c

@@ -130,7 +130,7 @@ STATIC mp_obj_t i2ctarget_i2c_target_obj___exit__(size_t n_args, const mp_obj_t
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2ctarget_i2c_target___exit___obj, 4, 4, i2ctarget_i2c_target_obj___exit__);
 
-//|     def request(self, timeout: float = -1) -> I2CTargetRequest:
+//|     def request(self, *, timeout: int = -1) -> I2CTargetRequest:
 //|         """Wait for an I2C request.
 //|
 //|         :param float timeout: Timeout in seconds. Zero means wait forever, a negative value means check once