Make towncrier marker independent from warning

Author: hynek

CHANGELOG.md

@@ -24,8 +24,9 @@ Do *NOT* add changelog entries here!
 This changelog is managed by towncrier and is compiled at release time.
 
 See https://github.com/python-attrs/attrs/blob/main/.github/CONTRIBUTING.md#changelog for details.
+-->
 
-towncrier release notes start -->
+<!-- towncrier release notes start -->
 
 ## [22.1.0](https://github.com/python-attrs/attrs/tree/22.1.0) - 2022-07-28
 

pyproject.toml

@@ -52,6 +52,7 @@ toplevel = ["attr", "attrs"]
 name = "attrs"
 directory = "changelog.d"
 filename = "CHANGELOG.md"
+start_string = "<!-- towncrier release notes start -->\n"
 template = "changelog.d/towncrier_template.md.jinja"
 title_format = ""
 issue_format = "[#{issue}](https://github.com/python-attrs/attrs/issues/{issue})"