www/onionshare: update 2.2_8 to 2.6

  * github.com/onionshare/onionshare/blob/v2.6/CHANGELOG.md
  * github.com/onionshare/onionshare/compare/v2.2...v2.6

PR:		265955
Sponsored by:	TorBSD Diversity Project, TDP
Sponsored by:	The Tor Project