Chore: Add comment to JIRA ticket in PopoverPrimitive showcase

Author: dchyun

showcase/app/templates/page-utilities/popover-primitive.hbs

@@ -20,6 +20,7 @@
             class="shw-utilities-popover-primitive-fake-toggle"
             {{PP.setupPrimitiveToggle}}
           >Toggle</button>
+          {{! TODO Set anchoredPositionOptions to optional https://hashicorp.atlassian.net/browse/HDS-5148 }}
           <div
             class="shw-utilities-popover-primitive-fake-popover"
             {{PP.setupPrimitivePopover anchoredPositionOptions=(hash)}}