Update taxonomy.json

taxonomy.json

@@ -42,8 +42,12 @@
    "name": "Model Architectures",
    "children": [
     {"name": "Transformer Models"},
-    {"name": "Recurrent Neural Networks (RNNs)"},
-    {"name": "Long Short-Term Memory (LSTM) Models"},
+    {
+     "name": "Recurrent Neural Networks (RNNs)",
+     "children": [
+     {"name": "Long Short-Term Memory (LSTM) Models"}
+     ]
+    },
     {"name": "Large Language Models (LLMs)"},
     {"name": "Graph Neural Networks (GNNs)"},
     {"name": "Latent Dirichlet Allocation (LDA)"}