Update comment per review

Co-authored-by: chrysle <96722107+chrysle@users.noreply.github.com>

piptools/_compat/pip_compat.py

@@ -85,7 +85,7 @@ def parse_requirements(
     ):
         install_req = install_req_from_parsed_requirement(parsed_req, isolated=isolated)
         if install_req.editable and not parsed_req.requirement.startswith("file://"):
-            # link.url is what is saved to the output file
+            # ``Link.url`` is what is saved to the output file
             # we set the url directly to undo the transformation in pip's Link class
             file_link = FileLink(install_req.link.url)
             file_link._url = parsed_req.requirement