(#2195) DBT_HTTP_TIMEOUT moved inside system download call

automatic commit by git-black, original commits:
  1c60882

core/dbt/clients/system.py

@@ -445,7 +445,7 @@ def download_with_retries(
 
 def download(url: str, path: str, timeout: Optional[Union[float, tuple]] = None) -> None:
  path = convert_path(path)
- connection_timeout = timeout or float(os.getenv('DBT_HTTP_TIMEOUT', 10))
+ connection_timeout = timeout or float(os.getenv("DBT_HTTP_TIMEOUT", 10))
  response = requests.get(url, timeout=connection_timeout)
  with open(path, "wb") as handle:
  for block in response.iter_content(1024 * 64):