fix(curriculum): Add select value example to step 9 (#62163)

Co-authored-by: Huyen Nguyen <25715018+huyenltnguyen@users.noreply.github.com>

curriculum/challenges/english/blocks/workshop-music-instrument-filter/67211aa4a8959cc122dfa0bb.md

@@ -7,7 +7,14 @@ dashedName: step-9
 
 # --description--
 
-Modify your `console.log` call to log the selected value from the dropdown.
+Modify your `console.log` call to log the selected value from the dropdown. 
+
+You can access the current value of a `select` element using its `.value` property. For example:
+
+```js
+const selectEl = document.querySelector("select");
+const selectValue = selectEl.value;
+```
 
 # --hints--