chore: upgrade playkit-ui-managers to version 1.8.4

Author: SivanA-Kaltura

package.json

@@ -90,7 +90,7 @@
   "kaltura": {
     "name": "call-to-action",
     "dependencies": {
-      "playkit-ui-managers": "1.8.3"
+      "playkit-ui-managers": "1.8.4"
     }
   }
 }