d/copyright: Fix the file encoding
Otherwise lintian (and therefore package builds on jenkins) fails with:
E: librem5-user-docs: debian-copyright-file-uses-obsolete-national-encoding at line 14Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this page for instructions on how to get full permissions. Sorry for the inconvenience.
Otherwise lintian (and therefore package builds on jenkins) fails with:
E: librem5-user-docs: debian-copyright-file-uses-obsolete-national-encoding at line 14