fix: bedrock (#1524)

* fix: bedrock

* fix: bad variable name

* fix: missing metatable

lua/avante/providers/bedrock/claude.lua

@@ -23,19 +23,19 @@ M.parse_response = Claude.parse_response
 
 ---@param provider AvanteProviderFunctor
 ---@param prompt_opts AvantePromptOptions
----@param body_opts table
+---@param request_body table
 ---@return table
-function M.build_bedrock_payload(provider, prompt_opts, body_opts)
+function M.build_bedrock_payload(provider, prompt_opts, request_body)
   local system_prompt = prompt_opts.system_prompt or ""
   local messages = provider:parse_messages(prompt_opts)
-  local max_tokens = body_opts.max_tokens or 2000
+  local max_tokens = request_body.max_tokens or 2000
   local payload = {
     anthropic_version = "bedrock-2023-05-31",
     max_tokens = max_tokens,
     messages = messages,
     system = system_prompt,
   }
-  return vim.tbl_deep_extend("force", payload, body_opts or {})
+  return vim.tbl_deep_extend("force", payload, request_body or {})
 end
 
 return M