don't use vcs name

Author: spoorcc

dfetch/commands/environment.py

@@ -24,5 +24,5 @@ def create_menu(subparsers: dfetch.commands.command.SubparserActionType) -> None
     def __call__(self, _: argparse.Namespace) -> None:
         """Perform listing the environment."""
         logger.print_info_line("platform", f"{platform.system()} {platform.release()}")
-        for vcs in SUPPORTED_PROJECT_TYPES:
-            vcs.list_tool_info()
+        for project_type in SUPPORTED_PROJECT_TYPES:
+            project_type.list_tool_info()