Fix Code Owners regression

When clicking on Add Owners, app was throwing js error:
Error: plugin 'code-owners' endpoint 'reply-reviewers': param is missing
a name.

Google-Bug-Id: b/231958341
Release-Notes: skip
Change-Id: Iff9488506359051efe20e3270353bef4868bd5b8
diff --git a/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts b/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
index 5aad3c2..56e18bd 100644
--- a/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
+++ b/polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.ts
@@ -704,10 +704,10 @@
         <section class="peopleContainer">
           <gr-endpoint-decorator name="reply-reviewers">
             <gr-endpoint-param
-              .name=${'change'}
+              name="change"
               .value=${this.change}
             ></gr-endpoint-param>
-            <gr-endpoint-param .name=${'reviewers'} .value=${this.allReviewers}>
+            <gr-endpoint-param name="reviewers" .value=${this.allReviewers}>
             </gr-endpoint-param>
             ${this.renderReviewerList()}
             <gr-endpoint-slot name="below"></gr-endpoint-slot>