Avoid these unexpected lint errors on .ics files:
- Error (TXT1) DOS Newlines You must use ONLY Unix linebreaks ("\n") in source code.
- Error (TXT5) Bad Charset Source code should contain only ASCII bytes with ordinal decimal values...
Also, their related auto-fixers (that break the format) are now not triggered anymore.
Specifications about newlines:
https://www.rfc-editor.org/rfc/rfc5545#section-3.1
Closes T15905