Submit Requirements - ignore case for endpoint requirement name

To be more flexible for code owner name, we allow Code owner,
Code-owner, Code Owner, ... to be connected with code owner
plugin.

Related change: Change #322855
Google-Bug-Id: b/205179179

Change-Id: I6913eb1e283b76c5a5915e0225d574a07af31ded
diff --git a/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts b/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
index 6406e3c..986db65 100644
--- a/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
+++ b/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
@@ -192,7 +192,9 @@
         <td>
           <gr-endpoint-decorator
             class="votes-cell"
-            name="${`submit-requirement-${charsOnly(requirement.name)}`}"
+            name="${`submit-requirement-${charsOnly(
+              requirement.name
+            ).toLowerCase()}`}"
           >
             <gr-endpoint-param
               name="change"