Update weak model document

Author: KennyDizi

docs/docs/usage-guide/changing_a_model.md

@@ -5,7 +5,7 @@ To use a different model than the default (GPT-4), you need to edit in the [conf
 ```
 [config]
 model = "..."
-model_turbo = "..."
+model_week = "..."
 fallback_models = ["..."]
 ```
 
@@ -28,7 +28,7 @@ and set in your configuration file:
 ```
 [config]
 model="" # the OpenAI model you've deployed on Azure (e.g. gpt-3.5-turbo)
-model_turbo="" # the OpenAI model you've deployed on Azure (e.g. gpt-3.5-turbo)
+model_week="" # the OpenAI model you've deployed on Azure (e.g. gpt-3.5-turbo)
 fallback_models=["..."] # the OpenAI model you've deployed on Azure (e.g. gpt-3.5-turbo)
 ```
 
@@ -52,7 +52,7 @@ MAX_TOKENS={
 
 [config] # in configuration.toml
 model = "ollama/llama2"
-model_turbo = "ollama/llama2"
+model_week = "ollama/llama2"
 fallback_models=["ollama/llama2"]
 
 [ollama] # in .secrets.toml
@@ -76,7 +76,7 @@ MAX_TOKENS={
 }
 [config] # in configuration.toml
 model = "huggingface/meta-llama/Llama-2-7b-chat-hf"
-model_turbo = "huggingface/meta-llama/Llama-2-7b-chat-hf"
+model_week = "huggingface/meta-llama/Llama-2-7b-chat-hf"
 fallback_models=["huggingface/meta-llama/Llama-2-7b-chat-hf"]
 
 [huggingface] # in .secrets.toml
@@ -91,7 +91,7 @@ To use Llama2 model with Replicate, for example, set:
 ```
 [config] # in configuration.toml
 model = "replicate/llama-2-70b-chat:2c1608e18606fad2812020dc541930f2d0495ce32eee50074220b87300bc16e1"
-model_turbo = "replicate/llama-2-70b-chat:2c1608e18606fad2812020dc541930f2d0495ce32eee50074220b87300bc16e1"
+model_week = "replicate/llama-2-70b-chat:2c1608e18606fad2812020dc541930f2d0495ce32eee50074220b87300bc16e1"
 fallback_models=["replicate/llama-2-70b-chat:2c1608e18606fad2812020dc541930f2d0495ce32eee50074220b87300bc16e1"]
 [replicate] # in .secrets.toml
 key = ...
@@ -107,7 +107,7 @@ To use Llama3 model with Groq, for example, set:
 ```
 [config] # in configuration.toml
 model = "llama3-70b-8192"
-model_turbo = "llama3-70b-8192"
+model_week = "llama3-70b-8192"
 fallback_models = ["groq/llama3-70b-8192"]
 [groq] # in .secrets.toml
 key = ... # your Groq api key
@@ -121,7 +121,7 @@ To use Google's Vertex AI platform and its associated models (chat-bison/codecha
 ```
 [config] # in configuration.toml
 model = "vertex_ai/codechat-bison"
-model_turbo = "vertex_ai/codechat-bison"
+model_week = "vertex_ai/codechat-bison"
 fallback_models="vertex_ai/codechat-bison"
 
 [vertexai] # in .secrets.toml
@@ -140,7 +140,7 @@ To use [Google AI Studio](https://aistudio.google.com/) models, set the relevant
 ```toml
 [config] # in configuration.toml
 model="google_ai_studio/gemini-1.5-flash"
-model_turbo="google_ai_studio/gemini-1.5-flash"
+model_week="google_ai_studio/gemini-1.5-flash"
 fallback_models=["google_ai_studio/gemini-1.5-flash"]
 
 [google_ai_studio] # in .secrets.toml
@@ -156,7 +156,7 @@ To use Anthropic models, set the relevant models in the configuration section of
 ```
 [config]
 model="anthropic/claude-3-opus-20240229"
-model_turbo="anthropic/claude-3-opus-20240229"
+model_week="anthropic/claude-3-opus-20240229"
 fallback_models=["anthropic/claude-3-opus-20240229"]
 ```
 
@@ -173,7 +173,7 @@ To use Amazon Bedrock and its foundational models, add the below configuration:
 ```
 [config] # in configuration.toml
 model="bedrock/anthropic.claude-3-sonnet-20240229-v1:0"
-model_turbo="bedrock/anthropic.claude-3-sonnet-20240229-v1:0"
+model_week="bedrock/anthropic.claude-3-sonnet-20240229-v1:0"
 fallback_models=["bedrock/anthropic.claude-v2:1"]
 ```
 
@@ -195,7 +195,7 @@ If the relevant model doesn't appear [here](https://github.com/Codium-ai/pr-agen
 ```
 [config]
 model="custom_model_name"
-model_turbo="custom_model_name"
+model_week="custom_model_name"
 fallback_models=["custom_model_name"]
 ```
 (2) Set the maximal tokens for the model: