Use 'Dismiss' to close pinned identity changes, instead of 'Ok' (#29569)

src/components/views/rooms/UserIdentityWarning.tsx

@@ -104,7 +104,7 @@ function getTitleAndAction(prompt: ViolationPrompt): [title: React.ReactNode, ac
                 },
             );
         }
-        action = _t("action|ok");
+        action = _t("action|dismiss");
     }
     return [title, action];
 }