fix(js): fix typo (#14570)

Author: lcian

docs/platforms/javascript/common/apis.mdx

@@ -534,7 +534,7 @@ parameters={[
 
 Any spans created inside of the callback will be children of this span.
 
-The started span will automatically be ended when the callback returns, and will thus measure the duration of the callback. The callback cann also be an async function.
+The started span will automatically be ended when the callback returns, and will thus measure the duration of the callback. The callback can also be an async function.
 
   <Expandable title='Examples'>
   ```javascript