sysutils/elephant: Update to 2.6.1

Changelog:

• https://github.com/abenz1267/elephant/releases/tag/v2.5.0
• https://github.com/abenz1267/elephant/releases/tag/v2.5.1
• https://github.com/abenz1267/elephant/releases/tag/v2.6.0
• https://github.com/abenz1267/elephant/releases/tag/v2.6.1

Reported by: GitHub (watch releases)