Fix `prefs.allow_autocompleting_comments` not saving

Release-Notes: skip
Google-Bug-Id: b/342316685
Change-Id: Id0b4602ecf86460c517429b49838f355b6200f11

polygerrit-ui/app/elements/settings/gr-preferences/gr-preferences.ts

diff --git a/polygerrit-ui/app/elements/settings/gr-preferences/gr-preferences.ts b/polygerrit-ui/app/elements/settings/gr-preferences/gr-preferences.ts
index fdb4f22..d12929f 100644
--- a/polygerrit-ui/app/elements/settings/gr-preferences/gr-preferences.ts
+++ b/polygerrit-ui/app/elements/settings/gr-preferences/gr-preferences.ts
@@ -600,6 +600,8 @@
         Boolean(this.prefs?.allow_browser_notifications) ||
       Boolean(this.originalPrefs?.allow_suggest_code_while_commenting) !==
         Boolean(this.prefs?.allow_suggest_code_while_commenting) ||
+      Boolean(this.originalPrefs?.allow_autocompleting_comments) !==
+        Boolean(this.prefs?.allow_autocompleting_comments) ||
       this.originalPrefs?.default_base_for_merges !==
         this.prefs?.default_base_for_merges ||
       Boolean(this.originalPrefs?.relative_date_in_change_table) !==