Added a note about prop modifiers on render function examples (#1712)

* feat: added explanation on prop modifiers

* fix: fixed quotes

* fix: fixed autoformatting

* fix: reverted change for .attr modifier

* fix: tweaked the wording on prefixes

Author: NataliaTepluhina

src/guide/extras/render-function.md

@@ -39,6 +39,10 @@ h('div', { id: 'foo' })
 // Vue automatically picks the right way to assign it
 h('div', { class: 'bar', innerHTML: 'hello' })
 
+// props modifiers such as .prop and .attr can be added
+// with '.' and `^' prefixes respectively
+h('div', { '.name': 'some-name', '^width': '100' })
+
 // class and style have the same object / array
 // value support that they have in templates
 h('div', { class: [foo, { bar }], style: { color: 'red' } })