Moved robust_optimizer to affectnet directory

Author: av-savchenko

src/ABAW/abaw4_lsd_train.ipynb

@@ -358,7 +358,7 @@
    "outputs": [],
    "source": [
     "import sys\n",
-    "sys.path.append('..')\n",
+    "sys.path.append('../affectnet')\n",
     "from robust_optimization import RobustOptimizer\n",
     "\n",
     "import copy\n",