[LLM] missing field `request_params`

I'm using neovim with llm.nvim and I'm getting this error when calling `LLMSuggestion` command:
```[LLM] missing field `request_params` ```

llm.nvim config:
```
require('llm').setup({
backend = "ollama",
model = "llama3:text",
url = "http://localhost:11434/api/generate",
request_body = {
parameters = {
temperature = 0.2,
top_p = 0.95,
}
},
})
```

Start by reproducing the LLMSuggestion command with the shown llm.nvim configuration and Ollama endpoint. Trace how request_body.parameters is handled and where the `request_params` error originates. Done means the same setup can request a suggestion without reporting the missing field.

Written by the indexing model from the issue text.