fix(frontend): restore -webkit-line-clamp on now-playing title

Keep the prefixed clamp alongside the unprefixed property so long
soundtrack titles still clamp to two lines in Safari and older Chromium.

Generated-By: PostHog Code
Task-Id: 1d54c00b-3d49-435b-8a16-971389d1382d

Author: gantoine

frontend/src/v2/components/GameDetails/SoundtrackPanel.vue

@@ -699,6 +699,7 @@ function seekValueText(v: number): string {
   overflow: hidden;
   text-overflow: ellipsis;
   display: -webkit-box;
+  -webkit-line-clamp: 2;
   line-clamp: 2;
   -webkit-box-orient: vertical;
 }