Update src/stdlib_hashmap_wrappers.f90

Co-authored-by: Ian Giestas Pauli <[email protected]>

Author: wclodius2

src/stdlib_hashmap_wrappers.f90

@@ -262,7 +262,7 @@ subroutine set_char_key( key, value )
 !!     key   - the output key
 !!     value - the input CHARACTER string
         type(key_type), intent(out) :: key
-        character(*), intent(in)    :: value(:)
+        character(*), intent(in)    :: value
 
         key % value = transfer( value, key % value, &
                                 bytes_char * len( value ) )