Customize release notes title

towncrier likes to capitalize things, so libp2p was showing up as
Libp2P. Uuuugly.

pyproject.toml

@@ -4,6 +4,7 @@ package = "libp2p"
 filename = "docs/release_notes.rst"
 directory = "newsfragments"
 underlines = ["-", "~", "^"]
+title_format = "libp2p v{version} ({project_date})"
 issue_format = "`#{issue} <https://github.com/libp2p/py-libp2p/issues/{issue}>`__"
 
 [[tool.towncrier.type]]