Update html to svelte(remaining ones)

site/content/tutorial/16-special-elements/06-svelte-document/text.md

@@ -6,7 +6,7 @@ Similar to `<svelte:window>`, the `<svelte:document>` element allows you to list
 
 Add the `selectionchange` handler to the `<svelte:document>` tag:
 
-```html
+```svelte
 <svelte:document on:selectionchange={handleSelectionChange} />
 ```
 

site/content/tutorial/16-special-elements/07-svelte-body/text.md

@@ -6,7 +6,7 @@ Similar to `<svelte:window>` and `<svelte:document>`, the `<svelte:body>` elemen
 
 Add the `mouseenter` and `mouseleave` handlers to the `<svelte:body>` tag:
 
-```html
+```svelte
 <svelte:body
 	on:mouseenter={handleMouseenter}
 	on:mouseleave={handleMouseleave}