sysutils/appjail: Update to 2.8.0

ChangeLog: https://github.com/DtxdF/AppJail/releases/tag/v2.8.0

• Added: support for unprivileged users in the main script (Now an unprivileged user can run appjail without running appjail-user and this is the recommended way.).
• Fixed: template_isvar() as it incorrectly detects a parameter as a variable.
• Fixed: test_param() as it returns false when a character is a space.
• Fixed: typo update -y -> update in PKG.
• Fixed: instruction order that does not require a specific order.
• Fixed: execution of the OPTION instruction when there are no options.

PR: 274171