Fix opening tag for schema snippet

[chee]

it was {% javascript %}{% endschema %} but i believe it is meant to be {% schema %}{% endschema %}

[fxbois]

Hi please add schema without removing JavaScript

[chee]

Hi please add schema without removing JavaScript

hey, i'm not removing javascript or adding schema.

the lines were:

 ("js"         . "{% javascript | %}\n\n{% endjavascript %}")
 ("schema"     . "{% javascript | %}\n\n{% endschema %}")

where the definition of schema opens as javascript and ends as endschema. i'm only fixing it so that the schema (that is already present) opens with schema rather than javascript. javascript is still there, on the line above.

[fxbois]

thx