www/threejs: update to r131 (bis) (bis) (bis)

This tarball has been re-rolled several times after the initial commit:
- r131 (bis) on Jul 30, 2021
- r131 (bis) (bis) on Aug 3, 2021
- r131 (bis) (bis) (bis) on Aug 4, 2021

Log at <https://github.com/mrdoob/three.js/commits/r131>

PR:		257731
Reported by:	Yasuhiro Kimura