fix(typings): add crossorigin html attr to img (#4686)

this commit adds the `crossorigin` html attribute for image tages
(`img`) to stencil's public runtime typings. upon applying this commit,
projects using stencil should be able to type the following in their
`render` function and not receive a typing error:
```tsx
render() {
  return <img crossorigin="anonymous"></img>
}
```

Fixes: #4685

src/declarations/stencil-public-runtime.ts

@@ -971,6 +971,8 @@ export namespace JSXBase {
 
   export interface ImgHTMLAttributes<T> extends HTMLAttributes<T> {
     alt?: string;
+    crossOrigin?: string;
+    crossorigin?: string;
     decoding?: 'async' | 'auto' | 'sync';
     importance?: 'low' | 'auto' | 'high';
     height?: number | string;