Update doc/specs/stdlib_hashmaps.md

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

Author: jvdp1

doc/specs/stdlib_hashmaps.md

@@ -1516,7 +1516,7 @@ undefined.
         end if
         call get( other, data )
         select type( data )
-        typeis (dummy_type)
+        type is (dummy_type)
             print *, 'Other data % value = ', data % value
         class default
             print *, 'Invalid data type in other'