README: tweak markdown

Author: ariya

README.md

@@ -92,7 +92,7 @@ export LLM_API_BASE_URL=http://127.0.0.1:10002/v1
 [![Test on OpenRouter](https://github.com/ariya/ask-llm/actions/workflows/test-openrouter.yml/badge.svg)](https://github.com/ariya/ask-llm/actions/workflows/test-openrouter.yml)
 [![Test on Together](https://github.com/ariya/ask-llm/actions/workflows/test-together.yml/badge.svg)](https://github.com/ariya/ask-llm/actions/workflows/test-together.yml)
 
-Supported LLM services include [AI21](https://studio.ai21.com), [Avian][https://avian.io], [Cerebras](https://cloud.cerebras.ai), [Deep Infra](https://deepinfra.com), [DeepSeek](https://platform.deepseek.com/), [Fireworks](https://fireworks.ai), [Groq](https://groq.com), [Hyperbolic](https://www.hyperbolic.xyz), [Lepton](https://lepton.ai), [Mistral](https://console.mistral.ai), [Nebius](https://studio.nebius.ai), [Novita](https://novita.ai), [OpenAI](https://platform.openai.com), [OpenRouter](https://openrouter.ai), and [Together](https://www.together.ai).
+Supported LLM services include [AI21](https://studio.ai21.com), [Avian](https://avian.io), [Cerebras](https://cloud.cerebras.ai), [Deep Infra](https://deepinfra.com), [DeepSeek](https://platform.deepseek.com/), [Fireworks](https://fireworks.ai), [Groq](https://groq.com), [Hyperbolic](https://www.hyperbolic.xyz), [Lepton](https://lepton.ai), [Mistral](https://console.mistral.ai), [Nebius](https://studio.nebius.ai), [Novita](https://novita.ai), [OpenAI](https://platform.openai.com), [OpenRouter](https://openrouter.ai), and [Together](https://www.together.ai).
 
 For configuration specifics, refer to the relevant section. The quality of answers can vary based on the model's performance.
 
@@ -103,11 +103,11 @@ export LLM_API_KEY="yourownapikey"
 export LLM_CHAT_MODEL=jamba-1.5-mini
 ```
 
-* [Avian][https://avian.io]
+* [Avian](https://avian.io)
 ```bash
 export LLM_API_BASE_URL=https://api.avian.io/v1
 export LLM_API_KEY="yourownapikey"
-export LLM_CHAT_MODEL=Meta-Llama-3.1-8B-Instruct
+export LLM_CHAT_MODEL="Meta-Llama-3.1-8B-Instruct"
 ```
 
 * [Cerebras](https://cloud.cerebras.ai)