Update config.json

Fixed on TGI: https://github.com/huggingface/text-generation-inference/releases/tag/v1.3.3
PR: https://github.com/huggingface/text-generation-inference/pull/1348
Is was never meant to support sliding window attention

config.json

@@ -16,7 +16,7 @@
   "num_key_value_heads": 8,
   "rms_norm_eps": 1e-05,
   "rope_theta": 1000000.0,
-  "sliding_window": 32768,
+  "sliding_window": null,
   "tie_word_embeddings": false,
   "torch_dtype": "bfloat16",
   "transformers_version": "4.36.0",