Don't use event.sender

Pull in a js-sdk change to avoid using event.sender (see js-sdk PR
for details).

Fixes https://github.com/vector-im/element-call/issues/1697

package.json

@@ -58,7 +58,7 @@
     "i18next-http-backend": "^2.0.0",
     "livekit-client": "^1.12.3",
     "lodash": "^4.17.21",
-    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#6385c9c0dab8fe67bd3a8992a4777f243fdd1b68",
+    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#4332277ce66969423113c63b467bb2fc8bb8614a",
     "matrix-widget-api": "^1.3.1",
     "normalize.css": "^8.0.1",
     "pako": "^2.0.4",