specified the entity to be used in the example

Co-authored-by: Jeremie Vandenplas <[email protected]>

Author: degawa

example/sorting/example_sort_bitsetl.f90

@@ -1,5 +1,5 @@
 program example_sort_bitsetl
-  use stdlib_kinds
+  use stdlib_kinds, only: int32
   use stdlib_sorting, only: sort
   use stdlib_bitsets
   implicit none