devel/ammonite: Update to 2.5.6

• Update coursier to 2.1.0-RC1 which also closes some potential security vulnerabilities
• Improved Scala 3 support including @main annotation support
• Added support for Scala 3.2.1

PR: 268900
Reported by: freebsd-ports@jan0sch.de
MFH: 2023Q1 (security fix)