Fix whitespace

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: zware

release_management/python-releases.toml

@@ -3557,7 +3557,7 @@ date = 2027-10-05
 [metadata."3.15"]
 pep = 790
 status = "prerelease"
-branch =  "3.15"
+branch = "3.15"
 release-manager = "Hugo van Kemenade"
 start-of-development = 2025-05-07
 feature-freeze = 2026-05-07