fix(cube-licence-date): handle parsing error

cube_doctor/transforms/update_cube_licence_dates.py

 import re
+import baron
 from datetime import date
 from redbaron import RedBaron
 
@@ -31,7 +32,12 @@ class UpdateCubeLicenceDates(Command):
                 old_licence = f"# copyright {match['start']} LOGILAB S.A."
             new_licence = f"# copyright {match['start']}-{today_year} LOGILAB S.A."
 
-            red = RedBaron(file_content_before)
+            try:
+                red = RedBaron(file_content_before)
+            except baron.parser.ParsingError:
+                # eh
+                continue
+
             for target in red("comment", lambda x: x.value.startswith(old_licence)):
                 target.value = target.value.replace(old_licence, new_licence)