fix: Set AutoModelForQuestionAnswering class path in config

This depends on [this PR](https://huggingface.co/EuroBERT/EuroBERT-2.1B/discussions/13), which adds the architecture to the modeling script.

config.json

@@ -8,7 +8,8 @@
     "AutoModelForPreTraining": "modeling_eurobert.EuroBertPreTrainedModel",
     "AutoModelForMaskedLM": "modeling_eurobert.EuroBertForMaskedLM",
     "AutoModelForSequenceClassification": "modeling_eurobert.EuroBertForSequenceClassification",
-    "AutoModelForTokenClassification": "modeling_eurobert.EuroBertForTokenClassification"
+    "AutoModelForTokenClassification": "modeling_eurobert.EuroBertForTokenClassification",
+    "AutoModelForQuestionAnswering": "modeling_eurobert.EuroBertForQuestionAnswering"
   },
   "attention_bias": false,
   "attention_dropout": 0.0,