fix: add item to whitelist (#5523)

Co-authored-by: Darragh Elliott <me@delliott.net>
Reviewed-on: #5523
Reviewed-by: tobiasd <tobiasd@fsfe.org>
Co-authored-by: delliott <delliott@fsfe.org>
Co-committed-by: delliott <delliott@fsfe.org>

tools/ci-checks/compare-xml-structure.py

@@ -52,6 +52,7 @@ def main() -> None:
             "//track[@srclang]",  # Languages, used in some track elements
             "//track[@label]",  # Language label, used in some track elements
             "/html/translator",  # the translator
+            "//discussion[@href]", # Mastodon links can be in different langs
         ],
         help="Comma-separated list xpaths that we then ignore.",
     )