README: Fixing eol from CRLF to LF

I've just forked and cloned this repo today and saw that git already pointed a diff in its status.

It checked README.md that had CRLF line endings. This probably occurred after @1cbb978 when it was set a defaul eol in `.gitattributes`.

To stop my personal pain I converted the EOL from CRLF (Windows) to LF (Unix). That's the only change in this commit.