v3.9.0: Make versions.json download URL configurable

What's Changed

🚀 Features

• Version 3.9.0 by @Andre601 in #109

🧰 Maintenance

• Bump okhttp from 4.9.0 to 4.9.1 in /core by @dependabot in #89
• Bump configurate-yaml from 4.1.1 to 4.1.2 in /bungeecord by @dependabot in #90
• Bump configurate-gson from 4.1.1 to 4.1.2 in /bungeecord by @dependabot in #91
• Bump configurate-yaml from 4.1.1 to 4.1.2 in /core by @dependabot in #92
• Bump configurate-gson from 4.1.1 to 4.1.2 in /core by @dependabot in #93
• Bump configurate-yaml from 4.1.1 to 4.1.2 in /velocity by @dependabot in #95
• Bump configurate-gson from 4.1.1 to 4.1.2 in /velocity by @dependabot in #94
• Bump velocity-api from 3.0.0 to 3.0.1 in /velocity by @dependabot in #96
• Bump adventure-api from 4.8.1 to 4.9.0 in /bungeecord by @dependabot in #97
• Bump adventure-api from 4.8.1 to 4.9.0 in /core by @dependabot in #98
• Bump adventure-text-serializer-legacy from 4.8.1 to 4.9.0 in /core by @dependabot in #99
• Bump adventure-api from 4.9.0 to 4.9.1 in /core by @dependabot in #100
• Bump adventure-text-serializer-legacy from 4.9.0 to 4.9.1 in /core by @dependabot in #101
• Bump adventure-api from 4.9.0 to 4.9.1 in /bungeecord by @dependabot in #102
• Bump adventure-platform-bungeecord from 4.0.0-SNAPSHOT to 4.0.0 in /bungeecord by @dependabot in #103
• Bump okhttp from 4.9.1 to 4.9.2 in /core by @dependabot in #104
• Bump adventure-api from 4.9.1 to 4.9.2 in /bungeecord by @dependabot in #105
• Bump adventure-text-serializer-legacy from 4.9.1 to 4.9.2 in /core by @dependabot in #106
• Bump adventure-api from 4.9.1 to 4.9.2 in /core by @dependabot in #107

Full Changelog: v3.8.2...v3.9.0