Rename subworkflow argument in subworkflows info command

The subworkflow info command referred to the subworkflow name
as "tool" in its list of arguments. It has been renamed to
"subworkflow" to align with the other subworkflow commands.

nf_core/__main__.py

@@ -1608,15 +1608,15 @@ def subworkflows_lint(ctx, subworkflow, dir, registry, key, all, fail_warned, lo
 # nf-core subworkflows info
 @subworkflows.command("info")
 @click.pass_context
-@click.argument("tool", type=str, callback=normalize_case, required=False, metavar="subworkflow name")
+@click.argument("subworkflow", type=str, callback=normalize_case, required=False, metavar="subworkflow name")
 @click.option(
     "-d",
     "--dir",
     type=click.Path(exists=True),
     default=".",
     help=r"Pipeline directory. [dim]\[default: Current working directory][/]",
 )
-def subworkflows_info(ctx, tool, dir):
+def subworkflows_info(ctx, subworkflow, dir):
     """
     Show developer usage information about a given subworkflow.
 
@@ -1633,7 +1633,7 @@ def subworkflows_info(ctx, tool, dir):
     try:
         subworkflow_info = SubworkflowInfo(
             dir,
-            tool,
+            subworkflow,
             ctx.obj["modules_repo_url"],
             ctx.obj["modules_repo_branch"],
             ctx.obj["modules_repo_no_pull"],