Update studio_issue_template.yaml

.github/ISSUE_TEMPLATE/studio_issue_template.yaml

@@ -6,15 +6,13 @@ body:
     id: linkmodel
     attributes:
       value: Please make sure that this is a MediaPipe Studio issue.
-  - type: dropdown
-    id: customcode_model
+  - type: input
+    id: os_model
     attributes:
-      label: Have I written custom code (as opposed to using a stock example script provided in MediaPipe)
-      options:
-        - 'Yes'
-        - 'No'
+      label: OS Platform and Distribution
+      placeholder: e.g. Linux Ubuntu 16.04, Android 11, iOS 14.4
     validations:
-      required: false
+      required: true  
   - type: input
     id: browserver
     attributes: