fix(hermes-2-pro-mistral): add stopword for toolcall (#1939)

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

embedded/models/hermes-2-pro-mistral.yaml

@@ -41,6 +41,7 @@ f16: true
 stopwords:
 - <|im_end|>
 - <dummy32000>
+- "\n</tool_call>"
 usage: |
       curl http://localhost:8080/v1/chat/completions -H "Content-Type: application/json" -d '{
           "model": "hermes-2-pro-mistral",