Update feedback template (#11974)

Author: sdwheeler

.github/ISSUE_TEMPLATE/04-customer-feedback.yml

@@ -59,6 +59,12 @@ body:
     attributes:
       label: Author
       description: GitHub Id of the author
+  - type: input
+    id: PlatformId
+    validations:
+      required: true
+    attributes:
+      label: Platform Id
   - type: input
     id: documentVersionIndependentId
     validations: