sysutils/elephant: Update to 2.7.7

Changelog:

• https://github.com/abenz1267/elephant/releases/tag/v2.6.2
• https://github.com/abenz1267/elephant/releases/tag/v2.6.3
• https://github.com/abenz1267/elephant/releases/tag/v2.6.4
• https://github.com/abenz1267/elephant/releases/tag/v2.6.5
• https://github.com/abenz1267/elephant/releases/tag/v2.7.0
• https://github.com/abenz1267/elephant/releases/tag/v2.7.1
• https://github.com/abenz1267/elephant/releases/tag/v2.7.2
• https://github.com/abenz1267/elephant/releases/tag/v2.7.3
• https://github.com/abenz1267/elephant/releases/tag/v2.7.4
• https://github.com/abenz1267/elephant/releases/tag/v2.7.5
• https://github.com/abenz1267/elephant/releases/tag/v2.7.6
• https://github.com/abenz1267/elephant/releases/tag/v2.7.7

Reported by: GitHub (watch releases)