Fix casing on css class

All the html uses the class "pendingAdd" but the css used "pending-add"

Release-Notes: skip
Change-Id: Ic9b3fedbd7e109a2bf5bf64fd7a97a3c6645406c

polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts

diff --git a/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts b/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
index 9ed6f6c..3fecd63 100644
--- a/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
+++ b/polygerrit-ui/app/elements/shared/gr-account-list/gr-account-list.ts
@@ -200,7 +200,7 @@
       .group {
         --account-label-suffix: ' (group)';
       }
-      .pending-add {
+      .pendingAdd {
         font-style: italic;
       }
       .list {