Add back Object Method header in bind-to-js section

Author: ryyppy

pages/docs/manual/latest/bind-to-js-function.mdx

@@ -82,6 +82,8 @@ MyGame.draw(10, 20, undefined);
 
 </CodeTab>
 
+## Object Method
+
 Functions attached to a JS objects (other than JS modules) require a special way of binding to them, using `bs.send`:
 
 <CodeTab labels={["ReScript", "JS Output"]}>

pages/docs/manual/v8.0.0/bind-to-js-function.mdx

@@ -101,6 +101,8 @@ MyGame.draw(10, 20, undefined);
 
 </CodeTab>
 
+## Object Method
+
 Functions attached to a JS objects (other than JS modules) require a special way of binding to them, using `bs.send`:
 
 <CodeTab labels={["Reason (Old Syntax)", "ML (Older Syntax)", "JS Output"]}>