add back-tick-quote for code noun

Author: phalodi

docs/programming-guide.md

@@ -1099,7 +1099,7 @@ for details.
 </tr>
 </table>
 
-The Spark RDD API also exposes asynchronous versions of some actions, like foreachAsync for foreach, which immediately return a FutureAction to the caller instead of blocking on completion of the action. This can be used to manage or wait for the asynchronous execution of the action.
+The Spark RDD API also exposes asynchronous versions of some actions, like `foreachAsync` for `foreach`, which immediately return a `FutureAction` to the caller instead of blocking on completion of the action. This can be used to manage or wait for the asynchronous execution of the action.
 
 
 ### Shuffle operations