Bug 1760894 - Change MOZ_RELEASE_ASSERT back to MOZ_ASSERT, r=necko-reviewers,dragana

This is a wallpaper patch, not a real fix.
This assertion was accidentally changed to `MOZ_RELEASE_ASSERT` in D135727.

Differential Revision: https://phabricator.services.mozilla.com/D141834

netwerk/protocol/websocket/WebSocketChannel.cpp

@@ -3265,7 +3265,7 @@ WebSocketChannel::Notify(nsITimer* timer) {
     AbortSession(NS_ERROR_NET_TIMEOUT_EXTERNAL);
     // mReconnectDelayTimer is only modified on MainThread
   } else if (timer == mReconnectDelayTimer) {
-    MOZ_RELEASE_ASSERT(mConnecting == CONNECTING_DELAYED,
+    MOZ_ASSERT(mConnecting == CONNECTING_DELAYED,
                "woke up from delay w/o being delayed?");
     MOZ_ASSERT(NS_IsMainThread(), "not main thread");