Fix invalid characters in template

```py
from transformers import AutoTokenizer

EXAMPLE_CHAT = [
{ "role": "user", "content": "Hello, how are you?" },
{ "role": "assistant", "content": "I'm doing great. How can I help you today?" },
{ "role": "user", "content": "I'd like to show off how chat templating works!" },
];

tokenizer = AutoTokenizer.from_pretrained("YokaiKoibito/llama2_70b_chat_uncensored-fp16")
prompt=tokenizer.apply_chat_template(EXAMPLE_CHAT, tokenize=False)
```
results in
```
TemplateSyntaxError: unexpected char '‘' at 246
```

This PR should fix that.

tokenizer_config.json

@@ -9,7 +9,7 @@
     "rstrip": false,
     "single_word": false
   },
-  "chat_template": "{{ bos_token }}{% for message in messages %}{% if (message['role'] == 'user') != (loop.index0 % 2 == 0) %}{{ raise_exception('Conversation roles must alternate user/assistant/user/assistant/...') }}{% endif %}{% if message['role'] == 'user' %}{{ ‘### HUMAN:\\n’ + message['content'] + ‘\\n\\n’ }}{% elif message['role'] == 'assistant' %}{{ ‘### RESPONSE:\\n’ + message['content'] + eos_token + ‘\\n\\n' }}{% else %}{{ raise_exception('Only user and assistant roles are supported!') }}{% endif %}{% endfor %}{{ ‘### RESPONSE:\\n’ }}",
+  "chat_template": "{{ bos_token }}{% for message in messages %}{% if (message['role'] == 'user') != (loop.index0 % 2 == 0) %}{{ raise_exception('Conversation roles must alternate user/assistant/user/assistant/...') }}{% endif %}{% if message['role'] == 'user' %}{{ '### HUMAN:\\n' + message['content'] + '\\n\\n' }}{% elif message['role'] == 'assistant' %}{{ '### RESPONSE:\\n' + message['content'] + eos_token + '\\n\\n' }}{% else %}{{ raise_exception('Only user and assistant roles are supported!') }}{% endif %}{% endfor %}{{ '### RESPONSE:\\n' }}",
   "clean_up_tokenization_spaces": false,
   "eos_token": {
     "__type": "AddedToken",