Update clang-format to reflect changes in recent version

[ranisalt]

Pull Request Prelude

• I have followed proper The Forgotten Server code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

Recent versions of clang-format have changed the bracing configuration for Mozilla, resulting in constructors following this format:

Class::Class():
{
}

Which doesn't really follow our standard anymore. This fixes the formatting while keeping source unchanged.

Alternatively, we could just adopt the new formatting rules.

[ranisalt]

Merging as it doesn't hurt 🤷