update docstring

Author: vtavana

Diff for: dpctl/tensor/_elementwise_funcs.py

@@ -528,7 +528,7 @@
 
 Args:
     x (usm_ndarray):
-        Input array, expected to have a real-valued data type.
+        Input array, expected to have a boolean or real-valued data type.
     out (Union[usm_ndarray, None], optional):
         Output array to populate.
         Array must have the correct shape and the expected data type.
@@ -767,7 +767,7 @@
 
 Args:
     x (usm_ndarray):
-        Input array, expected to have a real-valued data type.
+        Input array, expected to have a boolean or real-valued data type.
     out (Union[usm_ndarray, None], optional):
         Output array to populate.
         Array must have the correct shape and the expected data type.
@@ -2017,7 +2017,7 @@
 
 Args:
     x (usm_ndarray):
-        Input array, expected to have a real-valued data type.
+        Input array, expected to have a boolean or real-valued data type.
     out (Union[usm_ndarray, None], optional):
         Output array to populate.
         Array must have the correct shape and the expected data type.