sysutils/less: Update to 685

- Update MASTER_SITES
- Update WWW
- Use USES=localbase:ldflags
- Use pcre2 instead of pcre
- Remove COLORS option: it is no-op

Changes:	https://github.com/gwsw/less/blob/master/NEWS
PR:		290607
Approved by:	jharris@widomaker.com (maintainer)