Enabled the AutoModelForSequenceClassification in the auto_map

Added the `AutoModelForSequenceClassification` in the `auto_map` to enable Phi3SmallForSequenceClassification to be loaded.

config.json

@@ -7,6 +7,7 @@
   "auto_map": {
     "AutoConfig": "configuration_phi3_small.Phi3SmallConfig",
     "AutoModelForCausalLM": "modeling_phi3_small.Phi3SmallForCausalLM",
+    "AutoModelForSequenceClassification": "modeling_phi3_small.Phi3SmallForSequenceClassification",
     "AutoTokenizer": "tokenization_phi3_small.Phi3SmallTokenizer"
   },
   "blocksparse_block_size": 64,