Add attribute definition spellCheck to HTMLAttributes

Author: craftedsystems

src/jsx.d.ts

@@ -733,6 +733,7 @@ export namespace JSXInternal {
 		slot?: string;
 		span?: number;
 		spellcheck?: boolean;
+		spellCheck?: boolean;
 		src?: string;
 		srcset?: string;
 		srcDoc?: string;