Rename subworkflow argument to subworkflow instead of tool

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

@@ -1622,15 +1622,15 @@ 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, required=False, metavar="subworkflow name")
+@click.argument("subworkflow", type=str, 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.
 
@@ -1645,11 +1645,11 @@ def subworkflows_info(ctx, tool, dir):
     from nf_core.subworkflows import SubworkflowInfo
 
     try:
-        # Make tool name case insensitive
-        tool = tool.casefold()
+        # Make subworkflow name case insensitive
+        subworkflow = subworkflow.casefold()
         subworkflow_info = SubworkflowInfo(
             dir,
-            tool,
+            subworkflow,
             ctx.obj["modules_repo_url"],
             ctx.obj["modules_repo_branch"],
             ctx.obj["modules_repo_no_pull"],